... )2).The rotation speed: 300, 000 rpm -- 500, 000rpm 3).Grit size: #120, #150, #180, #400 4).Stainless steel body 5 ... : plastic box 6).Also we could supply OEM service. Shapes:Flame(FO:299,257); Round (BR: 001,002);Cylinder (SF:111 ... ,171);Round head inverted cone(EX: 141,237,234,220) Diamond dental burrs, diamond rotary instrument