Versatile Cleaning Tool: Perfect for residential, commercial, auto, boat and RV cleaning High Water Absorption: Greater liquid holding capacity for faster clean up High Efficiency: 3rd party independent laboratory testing shows that this sponge outperforms other brands in Elongation, Tensile and Tear Strength 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 All-Purpose Heavy-Duty 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. Extra Large Grouting Sponge is a professional-quality sponge for grouting and clean-up. 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.