Pen Needles (Pack of 5) – 4mm 32G

🧪 Maximize Precision & Minimize Trauma: 4mm 32G Pen Needles for Refined Subcutaneous Research Administration

Welcome to the essential supply hub for sterile 4mm 32G Pen Needles, the ultra-fine, ultra-short consumable critical for completing your precision peptide dosing system in preclinical research. 📏 At Buy Peptides Online USA, we provide researchers with more than just peptides; we supply the complete ecosystem of professional-grade tools required for rigorous, reproducible science. These industry-standard needles are engineered to pair seamlessly with reusable pen injector devices and 3ml cartridges, enabling accurate, consistent, and low-trauma subcutaneous (SC) administration in animal models. This detailed resource covers their exact specifications, compatibility, proper aseptic usage, and their vital role in promoting animal welfare, dosing accuracy, and experimental integrity.

🛒 Complete your dosing toolkit. Click to add a 5-pack of 4mm 32G Pen Needles to your cart. Ensure every administration is precise and professional.

🔬 What are 4mm 32G Pen Needles?

4mm 32G Pen Needles are sterile, single-use, ultra-fine hypodermic needles specifically designed to attach to the threaded hub of a standard reusable pen injector device. The “4mm” refers to the needle length (a very short 4 millimeters), and “32G” indicates the needle gauge (a very thin 32-gauge diameter).

These dimensions are intentionally optimized for reliable subcutaneous (SC) administration. The 4mm length is designed to consistently reach the subcutaneous tissue layer—where many peptides are effectively absorbed—without risking intramuscular (IM) injection, which can alter pharmacokinetics. The ultra-thin 32-gauge diameter minimizes tissue trauma, reduces discomfort in animal models, and helps ensure compliance in multi-dose study designs. Sold in convenient 5-packs, these needles are essential, disposable components that complete the pathway from your prepared peptide solution in its cartridge to the precise delivery of a micro-dose into the research subject.

📊 Pen Needles (4mm 32G): Complete Product Specifications

Precision delivery depends on precisely manufactured tools. Here are the complete technical specifications for these critical consumables.

⚙️ Primary Function & Research Applications

The sole function of these pen needles is to provide a sterile, sharp, and dimensionally consistent conduit for the subcutaneous delivery of research peptide solutions from a pen cartridge.

🔍 Key Research Applications & Benefits:

• Preclinical Subcutaneous Dosing Studies: Enables standardized, repeatable SC injections in rodent and small animal models, which is the preferred route for many peptide therapeutics due to its balance of absorption and convenience. 🐭
• Enhanced Animal Welfare & Protocol Refinement: The 4mm length and 32G thinness represent a Refinement strategy within the “3Rs” (Replacement, Reduction, Refinement). They minimize pain, distress, and tissue damage, which is ethically imperative and can reduce stress-related variables in your data.
• Improved Dosing Accuracy & Consistency: The ultra-short length ensures the needle tip reliably reaches the subcutaneous space without variance, leading to more consistent absorption profiles between subjects and across dosing days.
• Reduced Risk of Intramuscular (IM) Injection: For small animal models, longer needles can inadvertently deliver a dose into muscle tissue, which has different absorption kinetics. The 4mm length greatly reduces this risk, ensuring the compound is delivered to the intended tissue compartment.
• Essential for Pen-Based Dosing Systems: These are the final, critical component that makes a reusable pen injector a functional dosing tool. Without a compatible needle, the pen device cannot be used.

⚠️ Critical Usage Notice: This product is a sterile, single-use medical device component. It contains no drug or peptide. Its safety and efficacy depend entirely on proper use: attachment to a compatible, clean pen device containing a sterile peptide solution, followed by immediate safe disposal after a single use. It is intended for use by trained laboratory professionals following approved animal research protocols.

✅ Why Choose Our 4mm 32G Pen Needles?

The quality of your consumables directly impacts the quality of your research. Here’s why our needles are the right choice:

• Optimal Dimensions for Subcutaneous Research: The 4mm 32G combination is widely recognized in preclinical research as the ideal size for reliable, low-trauma SC dosing in common laboratory animal models, balancing ease of use with injection site consistency.
• Guaranteed Sterility & Sharpness: Each needle is individually sealed to maintain sterility and features a lancet-point tip for clean, sharp insertion that minimizes tissue resistance and animal distress.
• Universal Compatibility: Featuring the standard threaded hub, these needles are designed to screw directly onto the vast majority of reusable pen injector devices used in research settings, eliminating compatibility guesswork.
• Supports Ethical Research & Data Quality: By enabling a refined, less stressful dosing technique, you not only meet high animal welfare standards but also help ensure that your experimental outcomes are not confounded by injection-related stress responses.
• Convenient, Research-Focused Packaging: The 5-pack size is practical for initiating a new study, for use by individual technicians, or for maintaining a fresh, unexpired supply without committing to large bulk quantities.

👉 Click ‘Add to Cart’ to secure your supply of precision dosing needles. Uphold the highest standards in your research methodology.

🧼 Handling, Aseptic Use & Laboratory Protocol

⚠️ WARNING: THIS IS A SHARP, SINGLE-USE DEVICE. IMPROPER HANDLING OR RE-USE POSES SERIOUS RISK OF INFECTION, CROSS-CONTAMINATION, AND NEEDLESTICK INJURY.

1. Pre-Dosing Preparation:
   • Ensure your pen injector device is properly loaded with a filled 3ml peptide cartridge and that the dose is set to “0.”
   • Perform dosing procedures in a clean, dedicated area. Have a FDA-approved sharps disposal container immediately accessible.
2. Aseptic Attachment Protocol:
   • Remove a new needle from its sealed blister pack or protective cap by twisting off the outer shield. Do not touch the sterile needle hub or thread.
   • While holding the pen device upright, screw the new needle directly onto the threaded hub of the pen. Tighten firmly but do not overtighten.
   • Remove the new inner needle shield (the cap covering the needle itself) and set it aside. A drop of solution may appear at the needle tip; this is normal.
3. Priming (Essential Step):
   • With the needle pointing upwards, tap the cartridge gently to bring any air bubbles to the top (near the needle).
   • Set the pen dose selector to 2-5 units (as per pen manual) and press the dose button/plunger until a steady stream of solution is seen at the needle tip. This ensures the needle and cartridge headspace are filled with solution and not air, guaranteeing an accurate first dose.
4. Administration & Immediate Disposal:
   • Administer the dose to your research subject according to your approved subcutaneous injection protocol.
   • IMMEDIATELY AFTER USE, carefully re-sheath the needle using the single-handed scoop technique or a mechanical safety device NEVER use two hands.
   • Unscrew the shielded needle from the pen device and immediately place it into your sharps container. The needle is now used and must be disposed of.

👨‍🔬 Essential Laboratory Safety & Best Practices:

• These needles are for SINGLE-USE ONLY. Never use the same needle on more than one animal or for more than one injection. Re-use blunts the needle, causes significant tissue damage, risks infection, and invalidates your research.
• Always wear appropriate PPE: lab coat, gloves, and safety glasses.
• Never recap a used needle by hand. Always use the provided safety shield or a sharps container with a built-in sheathing mechanism.
• Dispose of all used needles directly into an approved, puncture-resistant sharps container. Do not overfill. Dispose of the container according to your institution’s biohazard waste regulations.

🚫 WARNING: FOR RESEARCH USE ONLY. NOT FOR HUMAN DIAGNOSTIC OR THERAPEUTIC USE. These needles are sold as single-use laboratory consumables for controlled preclinical research applications. They are not certified for human clinical use (e.g., diabetic therapy). The end-user assumes all responsibility for their safe, appropriate, and ethical use in compliance with institutional Animal Care and Use Committee (IACUC) protocols.

📦 Packaging, Shipping & Our Service Guarantee

• Secure, Compact Packaging: Needles are packed in their individual sterile shields, bundled securely in a 5-pack, and shipped in discreet, protective packaging that prevents damage or bending.
• Fast, Reliable Domestic Shipping: We ship from within the USA using efficient carriers to get these time-sensitive consumables to your lab promptly.
• Our Service Commitment: We guarantee the sterility and quality of these needles upon delivery. Our authenticity guarantee is supported by their compliance with manufacturing standards. We offer responsive customer support and a policy for product replacement in the highly unlikely event of a defective or damaged shipment.

❓ Frequently Asked Questions (FAQs)

Q1: Is a pen injector device included with the needles?

A1: No. This product is for the sterile, single-use pen needles only. The reusable pen injector device and the 3ml peptide cartridge are separate products that must be purchased and assembled independently to form a complete dosing system.

Q2: Why choose 4mm length over a longer needle?

A2: For subcutaneous dosing in common small animal models (e.g., mice, rats), a 4mm needle is the optimal length to reliably deposit the solution into the subcutaneous fat layer without the risk of going into the underlying muscle (intramuscular). IM injection can alter absorption rates and cause unnecessary pain and tissue damage.

Q3: Why is the 32-gauge (32G) important?

A3: The gauge refers to the needle’s thickness. A higher gauge number means a thinner needle. A 32G needle is extremely thin. This minimizes pain upon insertion, reduces tissue trauma and bleeding at the injection site, and generally causes less distress to the animal model, which is a key ethical consideration.

Q4: Can I use these needles to draw solution from a vial into a cartridge?

A4: No, and you should not. These are administration needles. For drawing and filtering a solution from a vial into a cartridge, you should use a separate, dedicated sterile drawing-up needle and a filter needle (0.22 µm). Using an administration pen needle for drawing can dull its ultra-sharp tip before it’s even used for an injection.

Q5: What do I do if the needle becomes bent or damaged before use?

A5: If a needle is damaged in its sterile packaging, do not use it. Dispose of it safely in a sharps container. If the damage occurred during shipping, please contact our customer service with your order details. For a needle that bends during an injection attempt, immediately stop, withdraw it safely, dispose of it, and attach a brand-new needle. Do not attempt to straighten and re-use it.

📝 How to Order & Final Researcher Notes

The 4mm 32G Pen Needle is a small component with a major impact on the quality and ethics of your in vivo research. Ensuring you have a steady, reliable supply is a fundamental part of responsible study planning.

To order these essential laboratory consumables:

1. Select the quantity of 5-packs you require.
2. Click “Add to Cart” and review your order.
3. Proceed to our secure checkout to complete shipping and payment.
4. You will receive prompt order confirmation and shipping notification.

We support the entire research workflow. For bulk institutional orders or to discuss your specific consumable needs, please contact our customer support team.

Disclaimer: This product is a sterile, single-use sharp. The buyer assumes all responsibility for the safe, appropriate, and ethical use of this product in compliance with all applicable institutional, local, state, and federal regulations governing animal research and biohazard safety. It is not for human use. Proper training in safe injection technique and sharps handling is required.