Kilrock :Descaler K Kilrock K Multi-Purpose Descaler removes limescale from all appliances kettles, shower heads, coffee makers, steam irons, W.C pans and garden sprinklers. DO NOT USE Kilrock K Multi-Purpose Descaler on Marble, Natural Stone or Enamel Surfaces. For removing limescale on Marble or non-acid resistant natural stone use HG Marble, Cement and Lime Film Remover. Two sizes are available 250ml also 400ml