TILE & GROUT BRUSH Product #18 *Ergonomic rubber grip won't slip when wet. *Hanger hook or hole for convenient storage. *Extra narrow head designed specifically to get into grout and other tight spaces. *Firm, flexible bristles for High Power cleaning. *33 tufts of extra durable, 7/8" recycled PET, staple-set fibers. *.56" x 3.5" scrubbing surface.