Mast Tour Max tattoo pen machine has 32mm grip bigger than Mast Tour, same with Mast Tour Pro machine motor, This machine has custom Mast coreless motor,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. Perfet 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 skin; suitable for all skin types. Needles Depth: 0-4.0mm. Stroke Length: 3.6mm. this tattoo machine rotary compatible with all standard power supplies and wireless power battery. Effortless to cover and protect Efficient cartridge change and replacement. Package include 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