Glass Polish GP15903 Hook and Loop Hand Sanding Block, Sanding Pad/Diameter 5 inch Diameter: 5 inch Ergonomic Hand Sanding Block with hook and loop fastener Semi-Flexibly PU layer makes our pad excellent to use on flat or curved surface, Durable materials, long lasting. Ideal to be used with any 5 inch sanding, abrasive, polishing discs