? All tattoo cartridge needles are individual packed and for disposable use only. ? Semi transparent tips make it easier to observe the needle striking. ? High elasticity silicone gel replaces iron spring, your tattoo work can be more smoothly. Meanwhile, you do not need to worry about spring becomes rust. ? This tattoo needle can be used together with various kinds of rotary tattoo machine/ pen style tattoo machine / coil tattoo machine. Many models for your choice. ? More Information: We sell all models of cartridge needles in our shop, if you want to buy other models, please search the model you need in our shop or contact us directly, we will share the product link with you. If you want buy needles in bulk, please contact us directly, we will offer you a discount.