Polishing Disc,abrasive disc,sanding disc Features: 1) Semi-flexible sanding disc 2) Purpose: for polishing metal, marble and Polishing Disc,abrasive disc,sanding discFeatures :1)Semi-flexible sanding disc2)Specifications: 4",4.5",5",6",7"3) Purpose: for polishing metal, marble and granite4) Supply ability: (4" - 5") 5,000pcs per day, (6"-7") 3,000pcs per day superflex disc