1.specification:4",4.5",5",6",7" 2.covered with:alumina or zirconia 3.application:remove rust,polishing Product name: fibre disc, similar name: abrasive disc, fiber disc, sanding disc, coated abrasive disc.1. safety2. high performanSize:Diameter of 100/115/125/150/180/230mm, thickness 1-2mm, center hole of 22mm.packing: 10-20pcs in shrink wrapped package, then in color box, carton box.material: ...