Mast Filp is one new designed machine that with six stroke length options (2.6mm,2.9mm,3.2mm,3.5mm,3.8mm,4.0mm) for a wide variety of procedures, suit for all kinds of tattoo style lining, shading, color packing.The Internal structure of the machine allows artists to keep the Flip Pen bagged while making stroke length adjustments, ensuring uninterrupted and seamless tattooing. The ergonomically design helps to reduce hand fatigue during procedures, use Mast coreless motor that this machine continuous operation, Low noise, Long-lasting stability.For more colors please click??Gradient Red, Gradient Blue, and Gradient Purple.Specifications:Diameter:30mmMachine Length: 112mmStroke Length: 2.6-4.0mmFive adjustable option: 2.6mm,2.9mm,3.2mm,3.5mm,3.8mm,4.0mmMotor: Mast Coreless motorWorking Voltage: 5-12VThe battery is not included.