100mm Frame Depth, Medium Duty, Recessed Manhole Cover with Polypropylene frame for up to 80mm Block Paving/Slab Infill. Usage: For external usage with infrequent slow moving traffic up to 5 tonnes GLVW. Recessed lids enabling block paving or paving slab infill Easy Slide-out design for effortless lid removal Built-in heavy duty lifting keys - No tools required! Single piece rigid formed lid for added strength Suits block paving and slabs up to 80mm deep Polypropylene frame. UK - Design and Manufacture Manufactured under an ISO 9001:2000 Quality System Finish: Hot dipped galvanised to BS EN ISO 1461 as standard