The T11G3 is a 600mm x 450mm recessed manhole cover with a fully galvanised tray and a polypropylene frame.Ideal for internal use, this cover features a factory fitted rubber sealing gasket to prevent any drain odours from escaping from the drainage system. It can also be used externally in pedestrian areas this cover is not suitable for driveway use. The driveway cover option in this size is the CD790R/80.The internal recessed tray depth of the T11G3 is 43mm ideal for concrete or screed infills.Like all manhole covers, the size refers to the clear opening size in this case 600mm x 450mm.The actual overall size of the cover and frame is 740mm x 590mm x 58mm. There is a moulded grouting flange for easy installation.This cover, which is made by Clark-Drain, has a 5 Tonne load rating.The technical specification sheet for this product can be downloaded by clicking here.