Spektra Xion BubbleGum with LightningBoltThe first pen style machine that gives artists full control of parameters to unleash their creative vision. Ergonomic and lightweight design for optimal maneuverability. Convenient interchangeable strokes to suit different styles of tattooing. 3. 2mm and 3. 7mm Stroke Wheels included with purchase. Made of aircraft grade aluminum, the fully assembled machine weighs only 5. 36 ounces. Secure ratcheting system enables artists to lock in needle depth