M.M. offers a line of gratings with high chemical resistance, which are suitable for use in chemically aggressive environments such as chemical, galvanic, extraction, manufacturing industry (tanneries, paper mills, etc.) and waste treatment. This line is characterized by the use of pure isophthalic or vinylester resin, which is free of additives, and the use of a higher amount of resin compared to the standard grating in order to ensure total coverage of fibreglass.