... noise and durable. automatic feeding device is optional. rolling shape: rolling thread, textured, ruled, roll bars etc FR-10x30 ... : 50.5mmWheel Thickness : 30mm 8*4The distance between wheel axle : 130mmWheel volume : 90mmWheel shaft angle : 20-40roll/minuteMain ... device is optional.7, rolling shape: rolling thread, textured, ruled, rolling light, cross knurling, roll bars, rolling groove, and roll- ...