Medicore Insulin Syringes Case 518 by Medicore Medical Supply GROUP: Needles & Syringes:Syringe/Needle Combo's:Insulin Standard Item Description: Insulin Syringe, 31G x 5/16", 3/10cc, 100/pk, 5 pk/Case Packaging Desc: Syringe Insulin 31Gx5/16In3/10Cc 100/Pack 5Pk/Case Country of Origin: Harmonized Tariff Code: Product Description: