A concrete manhole cover is a heavy cover made of reinforced concrete, used for accessing underground facilities such as sewage and water supply systems, and is valued for its low cost and theft resistance.

A cast iron manhole cover is a durable cover made from gray cast iron or ductile iron, used for accessing underground facilities such as sewage and telecommunications systems in high-traffic areas.

A composite manhole cover is a lightweight and durable cover made from fiberglass and resin, used for underground facilities such as sewage and telecommunications systems, and is secure against corrosion and theft.

A polyethylene manhole cover is a lightweight and durable cover made from high-density polyethylene, used for underground facilities such as sewage and telecommunications systems, and is resistant to moisture and...

A nanocomposite manhole cover is an advanced cover made from nanocomposite materials, used for underground facilities such as sewage, oil, and gas systems, and it offers high resistance to pressure and corrosion.

A copolymer manhole cover is a durable cover made from copolymer materials, used for underground facilities such as sewage and telecommunications systems, and it offers high resistance to moisture and chemicals....