sanding disc, aluminium oxide, 125mm, 180mm, 250mm, 300mm, for use with sander polishers, hook & loop backing sanding disc, 1. aluminium oxide, 2. 125mm, 180mm, 250mm, 300mm, 3. for use with sander polishers, 4. hook & loop backing 5. ideal for use on static machines velcro sanding disc