UltiCare VetRx U-100 3/10 cc, 29 ga. Insulin Syringe Dispenser is an at-home syringe dispense and dispose system that comes pre-loaded with 100 insulin syringes. The UltiCare Dispenser works in 3 easy steps: remove one package of syringes, place used ones in the top compartment with the roller, turn knob until syringe drops into container. Please note we are unable to accept returns of syringes or needles.