The material of the tattoo machine is pure brass, the frame is cut by hand with sculpture through special treatment, the frame is very exquisite, very special. It's all handmade from frame to coils, Coils made by insulated copper wire, which make it more powerful and lower heat generation,the cover is lovely face.When the tattoo machine are produced, our technicians will test it many times, make sure the tattoo is good to use for tattoo artist.1)Enough stable and enough powerful 2)Low vibration frame 3)Great weight front balance 4)Work powerful at quite low volt,it means a lower heat emission and a longer life 5)the material of contact screw is red copper.This is a top grade tattoo machine.Front springNew style of clad steel, can work 10 hours continuously, and the elasticity will not change to low.voltage: 4 10v frequency: 20000HZ coil: 8wraps liner & shader available; customized design frame welcome.