Aluminum hub needleDesigned for veterinary useSterile, non-toxicPyrogen freeAutoclavableColor codedEach needle is individually packaged and sealed with a tamper evident heat stakeDetectable Needles Coated With a Silicons Polymer Tri-beveled Copper rectangle hub Sterile Tamper evident cartridges are safe Cartridges are color-coded to follow industry standards Providing easy gauge Company: Hangzhou Medical Supplies