Extreme cartridges 100% E.O Gas Sterilized and individually packaged. <br>Smooth edges eliminate additional trauma. <br>Needles made of 316 medical grade stainless steel. <br>Precision assembly. Quality ensured with meticulous 30-point inspection, including pin alignment and solder distribution. Membrane mechanism prevents ink spitback. Low profile housing & better ink flow & shaped on the inside <br>Compatible with All types cartridge grips and pen style tattoo machines <br>Note: 3RL and 1203RL(on the product) is the same label