Klober's Clay Plain Tile Vent is a discreet in-line ventilating tile, suitable for clay and concrete plain tiles that provide 9,000mm2 effective ventilation area. Features • In-line design makes the vent virtually invisible in the roof line. • Can also be used with concrete plain tiles. • Adaptor and Flexipipe available for soil/mechanical extraction. Application • Most clay and concrete plain tiles on roof pitches 35° and above. • High or low level roof space ventilation. Material uPVC. Dimensions The size of 5 plain tiles.