... 125MM, 150MM, 200MM, 250MM, 300MM, 350MM, 400M, 450MM2. Roller quantity in per bush hammer: 3PCS, 4PCS, 5PCS, 6PCS, 9PCS ... and 12PCS3. Segment quantity in per roller: 30PCS and 45PCS4. Mainly used for the stone finishing ... hammer, “S” means the segment quantity in per roller.D. 150*4T*30SD. 200*4T*45SD. 250*5T*45SD ... D42/58, D47/63, D55/71 and so on.D. 350*9T*45SD. 400*9T*45SD. 450*12T ...