7000000381
3M 7000000381 Roloc Disc 361F Aluminum Oxide 2-in dia TR 80 Grit 25000 RPM
You will find that this concentrated liquid works well with both sprayers and mops.
3M 7000000381 Quick-Change Sanding Disc, Tr, 2 In Dia, Aluminum Oxide, 80 Grit,
A nice touch is that it's unthemed, so you can add your own logos or labels.