3M C41 Extra Large Commercial Size Sponge: These heavy-duty cellulose sponges are 10 times more absorbent than polyurethane sponges. The stronger construction makes them less likely to fall apart even after continued use. These commercial sponges clean tough baked-on messes 50% faster than other products. The larger size is designed for every cleaning job big or small. Ideal for heavy duty cleaning in the kitchen garage or outdoors including cast-iron pots stove burners broilers garden tools and grills. Country of Origin: United States.