Dragonhawk Tattoo - Mast Pro Tattoo Cartridges Needles 0.18MM Round Liner- Box of 20Introducing MAST Pro needle cartridges. These cartridges are tried and true! They have been tested vigorously by a wide range of tattoo artists. They feature needles that are made by 304L and polished by an automatic machine to ensure a much smoother outcome. The Mast Pro Cartridges are compatible with tattoo machines that accept standard twist to fit cartridges, including Cheyenne, FK Irons (Spektra Xion, Bellar, etc), Bishop, Equaliser, Scalpa, and