Tattoo needles are available everywhere, and all tattoo machines are using universal needles, so your worries of wrong choices will be much less. Compared with the pmu needle, the tattoo cartridge needs to be pushed harder, so it is equipped with a stronger motor. When you use it, you will find that its sound will be very loud. There is no need to worry, because this is its membrane spring design principle, The needle has configuration of anti-backflow. A variety of styles are available, and the needle types are optional. Which one do you use? Contact us freely for more info!