Rust Removing Nano Silicon Carbide Abrasive Kitchen Sponge,3 Pcs Size: 3.8 in x 2.7 in x 1 in Removes tough baked on messes This Super strong clean sponge is the best Nano Emery magic sponge and is a great sponge for descaling. Its small and incredible at cleaning removing rust like magic . Do not use on teflon or other protective coatings