The Microfiber Polishing Sponge is a dense sponge with a single microfiber side. The dual-sided sponge is great for washing and polishing cars, boats, RV’s, floors, countertops and furniture Premium density sponge with superior strength provides durability for all commercial and residential general-purpose cleaning High Water Absorption: Greater liquid holding capacity for faster clean up Durability That Lasts: Durable polyurethane material with hydrophilic cell design that won’t scratch surfaces and provides greater liquid-holding capacity for faster grout clean up Extra Large Design That Fits Great in Your Hand: Sponge size: 7.5" x 5.5" x 1.875" The Office Products Pro Microfiber Polishing Sponge is designed to withstand heavy duty cleanup, making it the best sponge for grout cleanup. This sponge is absorbent, quickly washes out and features rounded corners to prevent digging out or marring grout. This sponge is also great for general purpose cleaning, including kitchen and bathrooms along with washing cars, trucks, boats and RV’s. Sponge measures 7.5" x 5.5" x 1.875" The Office Products Pro 7-1/2 in. x 5-1/2 in. Microfiber Polishing Sponge is a professional-quality sponge with multi-purpose use. Its high water-holding capacity makes it ideal for any clean-up. It can also be used for car and boat washing as well as many other cleaning tasks.