Arena SMP PMU Rotary Pen Machine

Arena SMP PMU Rotary Pen Machine Innovative Driving Principle.More Quiet Sound And More Stable Operation, Just Like Drawing. Internal Spiral Needle Length Mechanism. More scientifc design ,when adjusting the length of the needle. The position of the needle will not change. Specifications: Motor Speed:12V/12000Rpm Size:25*117mm Stroke length:3mm Weight:85g