... 1/2 of the BMC with steel one , Convenient for transport, security check,install , open and rush-repari to reduce ... skid resistance value of 89,when tested by the materials laboratory of Devon country councilEnvironmental protection,energy saving : ... noise8,One-time molded, durableApplications:1,Molded resin covers, composite materials SMC covers , composite material BMC covers, magnesium covers, ...