Mast Tour Max tattoo pen machine has 32mm grip bigger than Mast Tour, strong power, light sound, suit for precise line work, black and grey shading, solid color packing. Gives a possibility to pack faster, more quality, and less trauma. Perfect tool for tattoo artists. This rotary tattoo pen advanced gear system that smooth, soft, and quiet operation, Ideal healing results. Flexible and lightweight for every style Gently and smoothly transfers ink to the skin; suitable for all skin types. Needles Depth: 0-4.0mm. Stroke Length: 3.6mm. this tattoo machine rotary is compatible with all standard power supplies and wireless power batteries. Effortless to cover and protect Efficient cartridge change and replacement. The package includes one Mast Tour Max rotary tattoo machine and one RCA cord.Specifications: Machine Length:90mm Stroke Length: 3.6mm. Weight: 133g Diameter: 32mm Motor: 7.5V/10000Rpm Suggest Voltage: 5-8V