Cleaning kit includes everything needed to clean hard water staining efflorescence from granite cemetery monuments, select stone masonry, as well as bathroom surfaces. Kit includes 1x Gallon of Hardwater Stain Cleaner, 4x CleanStone Expanded Glass Blocks, and 1x natural fiber Tampico 12" Fender Brush Additional Details ------------------------------ Bullet point: Versatile! Endurance Hardwater Stain Remover effectively removes hardwater staining and light rust from a variety of surfaces including granite, brick, block, grout, clay tile, glazed and vitreous tile. Endurance Hardwater Stain Remover will also clean porcelain tubs, sinks, toilets and shower heads, as well as soot and smoke staining from your fireplace. Please note that this product should not be used on limestone, marble or real travertine Product description: Cleaning kit includes everything needed to clean hard water staining efflorescence from granite cemetery monuments, select stone masonry, as well as bathroom surfaces. Kit includes 1x Gallon of Hardwater Stain Cleaner, 4x CleanStone Expanded Glass Blocks, and 1x natural fiber Tampico 12" Fender Brush