The 4Y tattoo needle modules are available in numerous variations. For Round Liners, Round Shaders, Magnum and Round Magnum needles, you have the choice between 0.30 and 0.35 needle sizes. The Powerliner 1RL is available in needle size 0.50 mm. Each needle cartridge is individually shrink-wrapped and EO gas sterilized. The box contains 20 needle modules, which you can order at a good price-performance ratio in the shop.