The image displays heavy-duty composite manhole covers, likely the Resintuff brand, which are made in Kenya.
They are typically made from polysynthetic or fiberglass-reinforced plastic materials.
The composite material gives them zero scrap value, preventing theft.
They are designed to be heavy-duty, with some models capable of bearing up to 40 tonnes.
These covers are used for sewers, water tanks, electric ducts, and other underground utilities.
They often feature a lockable design for added security.