Cover is 60cm in diameter and frame is 10cm depth - which you can see in the photos. Made out of concrete and metal.

This was removed from the driveway along the side of our house when we had an extension built. The back yard used to store drilling equipment so the driveway was heavy duty (loads of re-bar so a real challenge to pull up!), as were the man hole covers.

The last picture shows a similar manhole cover on part of the driveway that remains. 

Collection only from Redhill RH1 due to weight - will need two people to lift