This is the 300 grit 4" velcro backed wet diamond antiquing brush by Tenax. This "Airflex" brush is made for giving your stone a non polished textured look which resembles the texture of an old worn leather belt.

This is the sixth grit in the series of 6 grits you need to take the edge down and give it the antiqued look. When you are finished it will have texture and the full color of the stone will be exposed with no polish.