Ambition Tattoo Needle Cartridges are crafted using high quality materials. The cartridge casing is made from hardened smoked yellow/gold medical grade plastic, and designed to maximize accuracy and consistency. Each needle grouping is crafted using  stainless steel and lead-free solder in addition to superior quality control practices to ensure perfection. Designed to be used with all cartridge grips, pre-sterilized and individually blister packaged. (Box of20)