UltiCare Pen Needles come in three lengths: Mini, Short, & Original. Best of all, the Ulticare Pen Needles come packaged in a convenient sharps box. Simply remove an individually wrapped pen needle from the side door and attach it to the insulin pen. To remove the used pen needle, place the injector with pen into the red receptacle on top of the UltiGuard box. Unscrew the pen needle from the injector and turn the knob on the UltiGuard to dispose of the needle. Eliminate the possible risk of needle sticks using this safe system. 100 pen needles to a box.