• WARRIOR RED professional needle cartridges made with 316L surgical stainless steel • Design ensures optimal ink flow and precise application • High-quality silicone for greater comfort during use • Transparent tip for maximum visibility during work • Needles 100% sterilized with EO gas and individually packaged in blisters • Includes 20 disposable pieces per box • Compatible with all types of rotary, coil machines, and cartridge grips • Needle thickness: 0.35 mm, with 7 medium tapered needles of 3.5 mm • Ideal for permanent eyebrow makeup and detailed tattoo work