FIBER DISC minitype abrasive material for hand polishing machine SPECIFICATION Diameter 75MM/ ... OF COVERS IS 16MM,ALSO CAN BE DIFFERENT SIZE AND SHAPE COVERS CAN BE PLASTIC,STEEL,GLASS MAX ROTATION SPEED ≤3000R ... grinding, surpace preparation,blending cleaning,deburring. FEATURE Keep colour and shape,Good polished brightness,No black discoloration,Abration resistant,Stable,Durable