... quality. (3)A15, B125,C250,D400 (4)High quality. plastic manhole cover(1) Environmental protectionWith raw material non-toxicity, it ... Saving mine resourceIt is made by regenerated resin or regenerated plastic raw material, which save application of cast iron.(3) ... will be consistent with the lawn or ground, beautiful and functional.(7) Anti-theftNon-recycle, anti-theft naturally; the lock ...