The Merck Insulin Syringe Veterinary Caninsulin 40 IU 0.5 cc is designed for use with U-40 veterinary insulin such as Caninsulin. Featuring a 0.5 cc capacity and 29 G x 1/2 in needle, it supports precise dosing as directed by your veterinarian. Supplied in a convenient box of 100, it’s ideal for clinics and home care needing reliable pet insulin supplies. A trusted U-40 insulin syringe choice for consistent, day‑to‑day administration.