PS3100 Series Recess Tray, 900 x 600mm Clear Opening, F.A.C.T.A Class AAA 2.5T SMPWL & 0.5T SMSWL, when Filled With C25 Concrete. Galvanised to BS EN ISO 1461 after manufacture. Unit is Double Sealed And Locked With Slotted Head Screws 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 Dimensions Clear Opening: 900mm x 600mmExternal Dimensions: 985mm x 685mmOverall Frame Depth: 58mmTray Depth: 38mm