The 31-gauge, 8mm (5/16") BD Ultra-Fine Short Needle is 37 percent shorter than a 12.7mm needle. You should consult with your health care professional before using the BD Ultra-Fine Short Needle, and carefully monitor your blood glucose when changing to a shorter needles The item comes in a box of 100, and are packaged in polybags of 10 for your convenience. All BD insulin syringes are... Engineered with optimal point geometry for maximum comfort and reliability. Coated with special Micro-Bonded lubrication for a more comfortable inject"