AVA Cartridge Machine GTX

AVA Cartridge Machine GTXBrand new GTX Cartridge Pen  1.Motor: Japan motor,it is more power.2.New system: could open the pen,to change storke part and spring if damage3.With extra items: With 1PC 30mm tube+1 box tool kit+1 RCA cord+1 pen holder4. Long grip advantage:  Artist could adjust needle length even if they wire the grip cover.5.Color:Red/Blue/Purple/Gun-grey...