* SMC Manhole Valves are made of fiberglass prefabricated sheet and are suitable for heavy traffic.
* BMC manhole covers are made from fiberglass paste.
* The D400 Manhole covers can withstand up to 40 tons of traffic.
* C250 Manhole covers can handle up to 25 tons of traffic.
* B125 manhole covers can handle 12.5 tonnes of traffic.
* A15 manhole covers can withstand 1.5 tons of traffic.
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