So these floor machine pads are the black ones specifically designed for stripping floors - they're 16 inches in diameter and come in a box of 5. The black color indicates they're for heavy-duty stripping work, which means removing old finish, wax, and built-up grime from floors. They're compatible with pretty much all floor machines and auto scrubbers, so whether you have commercial equipment or a standard floor buffer, these should fit and work properly. They're made by Johnny Vac, which has been around in the industrial cleaning space for a while. These pads are seriously abrasive - we're talking about removing tough buildup that regular cleaning can't handle. They work on all kinds of hard floors - tile, vinyl, concrete, sealed wood - anywhere you need to completely strip off old coatings before reapplying new finish. The 16-inch size is pretty standard for commercial floor machines, and getting 5 in a box means you have backups when one wears out. Whether you're maintaining floors in a commercial building, school, hospital, or even doing serious floor work at home, these stripping pads have the aggression needed to get through tough buildup. They're not for everyday cleaning - these are for those periodic deep cleaning sessions where you need to start fresh with your floor finish. If you've tried lighter pads and they're not cutting through your floor buildup, these black stripping pads will definitely get the job done.