Spektra Xion Gorilla GoldRushFeatures The first pen style machine that gives artists full control of parameters to unleash their creative vision. Ergonomic and lightweight design for optimal maneuverability, weighing only 6. 55 ounces. Convenient interchangeable strokes to suit different styles of tattooing. 3. 2mm and 3. 7mm Stroke Wheels included with purchase. Secure ratcheting system enables artists to lock in needle depth settings. Seamless, adjustable 40MM Grip is