BD 328203 Ultra-Fine Original Pen Needles 12.7mm x 29 gauge are great for those on injectable medication, such as insulin, Growth hormons, HIV antijamplets and others. It is the premium choice sought after by medical experts worldwide for their accurate Insulin injections. Manufactured from stainless steel and coated with silicon oil, these needls are ultra thin and provide improved contact with and lower skin resistance - at merely 12.7mm with a thiny 29-guage, The 12.7mm size among strongest is commonly cited as making patients more comfortable for the injection process. Safe, reliable and exellaent on performance these ultra-clear original pen needles for use for after- doses of injectble aoudais.