Cheyenne Safety Open Liner NeedlesThe Cheyenne Safety Cartridges are sterile packed and ready to use. The tattoo needle cartridges are available in 20 piece boxes. Open Liners, the new configuration group of Cheyenne Safety Cartridges, are specially designed for artists who need thick, rich lines. The cartridge's individual needles run parallel along their entire length, as with the shaders, but the needle packages of the Open Liners are stiffer and the individual needles are sharper.