... team 3.OEM/ODM order available Fiberglass SMC BMC GRP FRP manhole cover includes the manhole base and cover with open holes. Both parts are ... this product is made by high temperature mould pressing, the gap between the base and the cover is small, it over comes ... ’ market demands and also as a promise of our material quality, like the RoHS, UL, CCC, ISO9001, etc.3, we, as ...