Dispensing Pen Needles – 32G / 4MM – 100 Pack

Pen Needles 32G 4mm (100-Pack) for Reusable Peptide Injector Pens

The Signature Peptides Pen Needles 32G 4mm (100-Pack) is the bulk supply option for researchers who use a reusable peptide injector pen regularly. This pack contains 100 individually sealed, sterile 32-gauge dispensing tips with a 4mm needle length, each featuring a universal screw-fit attachment and silicone coating. At 100 needles per pack, this is the lowest per-needle cost in the Signature Peptides range and provides enough supply for over three months of daily use.

Every needle in this pack meets ISO-certified standards and shares the same specifications as the 20-pack and 50-pack options. The only difference is quantity and value.

Product Specification

Bulk Value for Extended Protocols

Researchers running multi-week or multi-month protocols consume needles at a predictable rate of one per session. At that pace, a 100-pack of Pen Needles 32G 4mm covers approximately 14 weeks of daily use, or longer for protocols with less frequent sessions. Ordering in bulk means fewer reorders, fewer shipments, and a lower cost per needle than the 20-pack and 50-pack.

Because these needles are individually sealed and stored at room temperature, buying ahead doesn’t create expiry pressure. A 100-pack can sit on the shelf until needed without losing sterility or quality, making it a practical choice for researchers who prefer to keep a reliable stock on hand.

32G Ultra-Fine Needle Design

Each Pen Needle 32G 4mm has a 0.23mm outer diameter, thinner than the 31G (0.25mm) needles used by many competing pen kit suppliers. The thinner gauge creates a smaller puncture point, less tissue disruption, and improved comfort during repeated use. For researchers administering peptide solutions daily over several weeks, that comfort difference adds up.

The 4mm length targets the subcutaneous fat layer just beneath the skin surface without reaching muscle tissue. This is the standard delivery depth for peptide pen protocols and eliminates the risk of accidental intramuscular administration that longer needles can introduce.

A silicone coating on the needle surface reduces friction during insertion. Combined with the fine gauge, this makes each use noticeably smoother than uncoated or thicker alternatives.

Where Pen Needles Fit in the Peptide Pen Workflow

In a reusable peptide pen system, the workflow has four consumable components: bacteriostatic water for reconstitution, a glass cartridge to hold the solution, a measuring syringe to fill the cartridge and a pen needle for dispensing. Of these four, the pen needle is replaced most frequently because it is used and discarded after every session.

These Pen Needles 32G 4mm attach to the pen body after you install a loaded cartridge. Once a dose is dialled and delivered, remove the used needle and dispose of it safely. Attach a fresh sealed needle before the next session. The universal screw-fit thread ensures compatibility with the Signature Peptides Injector Pen Kit, all V1, V2 and V3 pen systems and any other pen using the standard attachment.

Safe Disposal and Handling

After each use, remove the needle from the pen without recapping. Place the used needle in a suitable sharps container. Never dispose of used needles in general waste. Do not bend, break or attempt to recap a used needle. Keep unused Pen Needles 32G 4mm in their sealed packaging at room temperature until needed. Discard any needle if the sterile seal appears open or damaged before first use.