Body: aircraft aluminum Size: approx. 30 x 115mm Motor: Mabuchi Motor Working voltage:3V~10V dc Weight:143g Stroke: 3.5mm Rpm Range Stitches: 8V-10000rpm/min Needle protrusion:0-4mm Connection: RCA only. This cartridge tattoo pen is CNC-Machined by aircraft Aluminium alloy and then anodized finish. Non-slip handle design, lightweight and exquisite. The motor parts can be disassembled and replaceable The advanced gear system guarantees reliability and quiet operation.