Plastic backing pad with depressed centre - Saitpad BZ - Sait | amastone®
4 Inch Angle Grinder Backing Pad M10 Polishing Pad for Fibre Sanding Disc;4 Inch Angle Grinder Backing Pad M10 Polishing Pad for Fibre Sanding Disc - Walmart.com
Amazon.com: Makita 743025-8 5" Plastic Backing Pad for GV5000 : Industrial & Scientific