The Royal Griddle Blocks come individually wrapped in polyethylene film and have been designed to facilitate safe removal of caked-on carbon and residue from hot grills. Made of glass foam, this Grill brick is fit for cleaning dull stainless steel grills, while the blackened utensils like pots and pans can be cleaned using its smaller pieces. These Royal Griddle Blocks are abrasive in nature and are not recommended for use on shiny stainless tables/equipment and polished or chrome-plated grill surfaces.