PRO SOURCE PS-430520 maroon floor stripping pads are for extra heavy-duty stripping. These are the highest abrasive stripping pads available. Use for only the most heavy-duty stripping applications. Works with all standard floor machines. Color-coded by application: green indicates scrubbing, black indicates floor stripping, maroon indicates extra heavy-duty floor stripping, tan indicates light cleaning/buffing, red indicates light cleaning/high gloss buffing, and white indicates polishing. Use only for extra heavy-duty stripping. Sold as a pack of 5. Works with standard floor machines. 20 inches in diameter.