Name:tattoo needle cartridge Material:304 steel needle (fast coloring with high hardness Shell material: translucent PVC material (easy to observe wear resistance Safety:ethylene oxide sterilization and disinfectio Model:M Specification:10 pieces/bo Features:high hardness, fast rebound and precise assembly. Steam Sterilizatio HIGH TOUGHNESS SILICONE RESILIENT RUBBER RING--Keep the original elasticity and strength under long-term and high-frequency working condition LARGE INK STORAGE AND INK-JET PREVENTION--The groove design reduces the inkjet effect in the process of needling to a smaller extent and increases the amount of ink stored. CONVENIENT FOR NEEDLE REPLACEMENT--Press the integrated needle down to the bottom, rotate it clockwise to complete the installation, and rotate it anticlockwise to unload. PVC TRANSPARENT HIGH WEAR-RESISTANT MATERIAL--Better observation of needle output and the ink, and avoid needle shakin MARKED WITH MODEL NUMBER--The model of the needle is printed on the front of the integrated needle