Description
Nano Pen Needles brought the 4mm length to insulin pen therapy, pairing a short 32G needle with the Ultra-Fine profile. The short length targets the subcutaneous layer while keeping the needle out of muscle tissue for most users. It remains the reference format that diabetes educators teach first.
- 4mm Short Length – Reaches the subcutaneous layer for reliable absorption without a pinch-up technique for most users
- 32G Ultra-Fine Profile – A fine gauge keeps penetration force and tissue trauma low across multiple daily injections
- Thin Wall Design – The thin wall supports insulin flow without extra thumb pressure on the pen
- Pen Compatibility – Threads fit widely used insulin pens across major pen platforms
The Original 4mm Pen Needle
Pen users inject into the same small rotation of sites every day, so needle length and gauge decide how sustainable that routine feels. This 4mm format was built to keep insulin in the subcutaneous fat layer, where absorption is most consistent. Longer needles raise the chance of intramuscular delivery, which can speed absorption unpredictably and cause stinging. The 32G Ultra-Fine profile keeps each penetration small, and the thin wall lets the dose move without forceful thumb pressure. Sterile single-use packaging keeps the format aligned with standard injection teaching. Clinics stocking the classic 4mm format use it as the default for new pen starts and technique refreshers.
Features and Benefits
Needle Profile
- Ultra-Fine 32G – Fine gauge geometry keeps skin entry gentle for frequent daily use
- 4mm Subcutaneous Length – Short length reduces intramuscular injection risk for most body types
Daily Use
- No Pinch-Up for Most – Straight-in injection at 90 degrees suits the 4mm length for most adults
- Standard Threading – Fits widely used insulin pens without adapters
Product Specifications
Needle Details
- Needle Gauge: 32G
- Needle Length: 4mm (5/32 inch)
- Needle Line: Original 4mm (Ultra-Fine)
- Catalog Number: 320122
- NRC Number: 83017-0122-03
Packaging
- Count per Box: 100 pen needles
- Packaging: Case of 12 boxes (100 per box, 12 boxes per case)
- Use: Sterile, single use
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Why Choose the Nano Pen Needles
A 4mm needle removes the guesswork that comes with longer formats, especially for lean users and children. Predictable subcutaneous delivery is the foundation every other part of pen therapy builds on.
- Steadier Absorption – Subcutaneous placement keeps insulin uptake consistent from dose to dose
- Simpler Teaching – Straight-in technique without a skin fold is easier to demonstrate and to remember
- The Established 4mm Standard – Unlike newer specialty formats, this needle is the long-standing reference that pen training materials describe
Frequently Asked Questions
Is 4mm long enough for adults?
Yes, skin thickness at injection sites is well under 4mm for nearly all adults. The needle crosses the skin and delivers into the subcutaneous layer beneath it.
What is the difference from the 2nd Gen version?
This is the original 4mm needle with the standard base. The 2nd Gen version adds a contoured base designed to support technique and reduce intramuscular risk.
Does it need a pinch-up?
Most users inject straight in without a pinch-up at 4mm. Very lean users and young children may still be taught a skin fold by their care team.
How many needles come in a case?
A box holds 100 pen needles and the case holds 12 boxes. That case quantity is the format sold on this listing.
Are these sterile?
Yes, each needle is sterile and intended for a single use. A fresh needle for every injection is the standard recommendation.
