needle diameter 32G (0.23mm) needle length4 mm Droplet® insulin needles have been designed to meet the diverse needs of antidiabetic therapy. Droplet insulin needles are universal and work with the following Type A pens: Omnican® Pen 31/32 BerliPen® 301 and Areo HumaPen® MEMOIR, LUXURA, Ergo II Novopen® 3, Junior Autopen® OptiPen® Pro 1, 2 Droplet insulin needles: Simple to use. Just change the Droplet needle after each injection. Versatile and compatible with the pen you use every day. Droplet needles fit most of the leading brands of pens available on the market. Easy to use for anyone and in any age. Just screw on the pen, do the injection, and discard the needle. The special method of covering the needle with silicone makes the puncture gentle. Soft and delicate needle penetration into the skin. Quick and precise administration of insulin to achieve treatment goals. Specially designed thread prevents leakage of insulin. Wide range of sizes to meet your individual needs.