"UltiGuard UltiCare Original Pen Needles 29 Gauge X 1/2" (.33mm X 12mm) 100 Pen Needles, Non-Pyrogenic, Non-Toxic. May be used as replacement needles for all Type A Insulin pen delivery devices including: Autopen, BD pen, FlexPen, Humalog Pen, Humulin Pen,"