MVP Vet Syringe U-40 Insulin, 1/2 cc, 29 gauge x 1/2 in, 100 is a box of insulin syringes designed for accurate delivery. MVP Insulin Syringes are made with the highest quality materials like surgical-grade stainless steel for the needles. The single unit markings on the syringe are easy to read for extra accuracy. Please note we are unable to accept returns of syringes or needles.