Sure Comfort Short Pen Needles 31G, 5/16in, 8mm - 100 ea Go to amazon.com Related posts Which is the best insulin needles 5/16? FeatureLubricated Needle for your injection comforall Type A insulin pen delivery devicesdesigned for injection ease and comfort DescriptionSure Comfort Short Pen Needles 31 Gauge, 5/16in, 8mm may be used as replacement needles for all Type A insulin pen delivery devices.