XNET VREX cartridge needles are disposable single-use, allow tattoo artists to set up needles and switch needle configuration very quickly during tattooing process. ​ ​Cartridges come with membrane to prevent ink leakage to the tube or machine. ​Semi transparent & bevil tips make it easier to observe the needle striking. ​Compatible with All types cartridge grips & machines. No Allen keys required. ​Made of 316L surgical stainless steel and medical grade plastic. ​E.O. sterilized and packaged in blister pack. ​Package include 1 boxes, 20pcs per box, totally 20pcs. ​Cartridge needles diameter and taper specification: ​ ​Needle Diameter-- ​#10 Bugpin 0.3mm ​ ​#12 Regular 0.35mm ​ ​Taper-- ​RL means Round Liner Long Taper about 5.5mm ​ ​RM means Curved Magnum Medium Taper about 3.5mm