The time tested formula for this sponge provides superior strength and a cell structure that wipes and rinses excess grout and concrete faster. The product incorporates a layer of our 2520 BuffCell material on 1 side to assist in removing grout haze from the surface of the tiled area prior to cure. The sponge is shaped with rounded edges that are designed to minimize digging out or scouring of grout lines to meet the demands of the professional setter. Size: 7.50" H. x 5.25" W. x 2.25" D.