Wet Polisher+4 Inch Diamond Polishing 40 Pad Granite Concrete Marble Wet Fixed Speed Polisher (with simple water feed design). 39+1 Pieces of 4" Diamond Polishing Pad for granite marble concrete. 7 X Grit 50 100, 6 X Grit 200, 5 X Grit 400 800, 3 X Grit 1500 3000 Buff. +4" Velcro backer. the hose connector diameter is 1/2" , if you don't like it, or, can't use the hose connector most hardware stores sell other fittings in the garden hose departments