UltiGuard U-100 1/2 cc, 30 ga. 5/16" Insulin Syringe Dispenser allows users to discard used syringes into the top compartment with one quick movement. This patented tamper-proof product provides safety and security, and is an essential part of an at-home treatment plan for pets with diabetes. Please note we are unable to accept returns of syringes or needles.