Extreme cartridges 100% E.O Gas Sterilized and individually packaged. <br>Smooth edges eliminate additional trauma. <br>Membrane mechanism prevents ink spitback. The membrane and tip of these needles allow artists to enjoy a more fluid tattooing procedure; Compatible with all rotaries/coiled machine, pen style tattoo machine. Comes in 20pcs <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