This double sealed manhole cover is part of the range of internal manhole covers from EJ. Sealed manhole covers prevent any odours from escaping, as well as maintaining air pressure. 58mm Deep, Medium Duty, Recessed Tray Type Cover for Floor Finish Infill Usage: For internal usage and areas with infrequent slow moving traffic up to 10 tonnes GLVW Recessed lids enabling concrete or concrete & floor finish infill Solid steel base plate Keying in bars fitted within lid recess Specially produced matching lid and frame section Brass edge & stainless steel edging available Double rubber sealed and locked as standard Non standard sizes are available Manufactured under an ISO 9001:2000 Quality System Finish: Hot dipped galvanised to BS EN ISO 1461 as standard