Liner or Shader - Both Multi-Purpose Machine Type - Rotary Machine Brand - Stealth® (1st Generation) Frame Material - CNC'd from Aircraft Aluminum Motor Info and Max RPM - Japanese Motor & 7,000 Maximum RPM Needle Swing - We offer 3 different swing lengths: 4.5mm, 4mm, & 3mm. Special note: We sell bearings separately if you decide you want to change your swing length later. Machine Connection - Available in RCA or Clip Cord connection. Weight - 3.9 oz Included in the Set - 4mm bearing, 4.5mm bearing, & 2 allen keys. Product Info - Why do we offer 3 different swing lengths? Everyone's needle swing preference is different. Not everyone has the same preference when tattooing. Also it depends on if you are going to be using it as a liner or shader. The bearings are easy to change and can be done in 1 min. Please check out our YouTube Video to see how to change it. The machines are available in Clip Cord or RCA connection for power.