... marble Specifications Polishing Disc,abrasive disc,sanding disc Features: 1) Semi-flexible sanding disc 2) Purpose: for polishing metal, marble andPolishing Disc,abrasive disc,sanding discFeatures ... : 1)Semi-flexible sanding disc 2)Specifications: 4",4.5",5 ... day, (6"-7") 3,000pcs per day abrasive super-flex sanding disc