- Safety membrane and Stable Needle Shaft system - Unibody mold housing of tip ensures for precise and sturdy - Engineered to allow better ink flow and visibility - All cartridges are packaged in individual sterile blister packs - Fits all types cartridge grips - Made of 304 Surgical Stainless Steel and medical-grade plastic housing - For outlining and coloring and packing works - EO Gas Sterilized - Box of 20pcs