Fibre reinforced concrete Cover blocks are made from very high strength concrete. The ingredients are Cement , Microsilica, Stone aggregare and polypropylene fibres..They are vibro compacted on Italian Machinery imported specially for this product. The average strenth of the product is not less than 60 mpa. Sizes are available 15, 20, 25, 30, 40 AND 50MM .Also available in multiples sizes like 30*40 and 35*45*50