The Advantage Unleaded Gable Abutment Cavitray is for use by installers who wish to introduce their own flashing medium at a later date. Each unit is moulded from DPC and has a variable cavity upstand. Whilst being built into an exterior skin the mortar under each tray is raked partially out to provide a joint into which flashings can be tucked and wedged. There is a requirement to point-in flashings after. Trays are designed for use in standard 75mm(brickwork) courses. This tray straddles the ridge. Properties Length: 900mm. Width: 130mm. Vertical: 192mm. Pitch: 17.5 - 50 degrees. Cavity widths: accommodates 50mm - 140mm. Colour: black. ODP: zero.