DaVinci Cartridge Round Shaders by BishopDA VINCI Needle Cartridges "ALWAYS ON POINT" DA VINCI Needle Cartridges are disposable single use tattoo needle cartridges that allow tattoo artists to set up needles and switch needle configuration very quickly during the tattooing process. Precise quality control to ensure excellent needles every time. With the smooth undercarriage will allow less trauma to the skin and more comfort for the client. Safety membrane inside system Engineered to allow