NEW THINNER NEEDLE! The 31-gauge, 8mm (5/16") BD Ultra-Fine™ II 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™ II Short Needle, and carefully monitor your blood glucose when changing to a shorter needle. People who use the 3/10 cc version of this syringe can now choose between a barrel with full-unit markings and BD's new 3/10 cc barrel featuring a unique half-unit scale. If you measure doses in half-unit increments, the half-unit markings may help to make your small insulin doses easier and more precise than ever. BD Ultra-Fine™ II insulin syringes are available in three barrel sizes (1cc, ½ cc and 3/10 cc). They come in boxes of 100, and are packaged in polybags of 10 for your convenience.