We are offering glass cleaner excellent product can be used on any surfaces like: steel, porcelain, ceramics, grout, laminated sheets, glass, etc. It is a stain remover for permanent marker, crayons, ball pens stains etc. pack size: 2 x 5ltr jerry cans. These are much better than polishes and other harmful solvents. Only few drops need to be poured on scrubber to polish the glass.