56mm Deep, 40mm Tray Depth, Medium Duty, Recessed Manhole Cover for floor finish Infill Usage: For internal usage with infrequent slow moving traffic up to 10 tonnes GLVW UK Patent App. 2450631 Built-in S.L.K. Secure Lifting Keys - steel loop handle for maximum durability & strength Discreet locking points c/w protective S.L.K. cap Polypropylene seal for improved sealing & handling properties Single piece steel lid for added strength & rigidity New 'O' ring continuous rubber seal to prevent the egress of odours New 'Savage StackRight' design for improved stability in storage UK - Design and Manufacture Manufactured under an ISO 9001:2000 Quality System Finish: Hot dipped galvanised to BS EN ISO 1461 as standard Dimensions Clear Opening: 600mm x 450mm Internal Recess: 40mm Overall Base: 726mm x 576mm Frame Depth: 56mm Over Top of Frame: 694mm x 544mm