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. These are right handed and are built in every course up the rake of the abutting roof. Cavitrays to provide stepped DPC presence within wall only. Properties Length: 330mm. Width: 132mm. Vertical: 192mm. Pitch: 17.5 - 50 degrees. Cavity widths: accommodates 50mm - 140mm. Colour: black. ODP: zero.