Refill Pack 2pcs of each Silicon sandpaper Set 7 Grits (180-1200) For PRO Reciprocating Electric Sander. The combination of soft membrane abrasive layer and silicon rubber make the sandpaper conforms sanding better and provides more thorough grinding action. The abrasive layer utilize fabric-alike soft membrane material to achieve best balance between flexibility and stretchiness, with excellent durability as well as cutting efficiency., Manufacturer: Akfldms