Dimensions Clear Opening: 600 x 450mm External Dimensions: 685 x 535mm Overall Frame Depth: 58mm Tray Depth: 38mm Description This range of recessed covers is designed to be in-filled with a suitable screed or concrete, and are available in a range of clear opening sizes and feature, as standard, four locking screws and rubber neoprene seals to resist gas egress and water ingress. The standard tray depth is a nominal 40mm unless otherwise indicated. Ideal for indoor use these unobtrusive access covers can be in-filled with screed, tiles and other floor surfaces. The frame and cover are galvanised to BS EN ISO 1461. Manufactured from strong and highly durable mild steel Steel frames have superior adherence to bedding mortar than plastic frames J key available for lifting through screw holes Galvanised to BS EN ISO 1461