Garryson Garryflex Abrasive Blocks are made from resilient rubber which is filled evenly throughout with hard abrasive grit. They are ideal for cleaning and polishing all metals and ceramics. Use instead of emery cloth, wet and dry, wire wool etc. Available in Fine (240G), Medium (120G), Coarse (60G) and Extra Coarse (36G). Each grade is a different colour. Size 80 x 50 x 20mm. This Garryson Garryflex Abrasive Block has the following specification Grade Fine 240 Grit. Colour Brown.