Mast Tour Pro pen machine has 3.6mm stroke length, work for tattoo lining and SMP. Dragonhawk B1 battery is small and super lightweight, better compatible with Tour Pro short pen machine. The Mast Tour Pro rotary tattoo pen machine is a durable machine with pen-like design, flexible and lightweight for every style Gently and smoothly transfers ink to skin; suitable for all skin types. Effortless to cover and protect Efficient cartridge change and replacement. Kit includes: 1*Mast Tour Pro rotary pen 1*Dragonhawk B1 battery 20*Cartridges 1*clip cord 1*bag 1*prastice skin