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. Advantage External Angles are used in place of catchments when commencing laying from the corner of a building. Cavitrays to provide stepped DPC presence within wall only. Properties Length: 220mm. Width: 220mm. Vertical: 192mm. Pitch: 17.5 - 50 degrees. Cavity widths: accommodates 50mm - 140mm. Colour: black. ODP: zero.