Ubbink's UB8 clay slip is an in-line roof ventilating tile for use in small plain non-interlocking tiles. Designed specifically to merge into the surface of plain tiles and you must apply your own tiles to colour match. The UB8 unit has a free vent area of 6,250mm. For the UB8 vent to be converted into a terminal add a UB8 connector 294304. Properties Length: 340mm. Width: 340mm. Weight: 0.61kg. Free vent area: 6250mm2. Material : vacuum formed polypropylene. Colour: anthracite. Application Suitable for most concrete and clay plain tiles. Provoides high or low level roof void ventilation. Features No batten cutting necessary. Moulded grill directs ventilation to roof void. 110mm diameter adaptor available for connection to soil & vent/mechanical extraction. Prevents ingress of birds/vermin and large insects. Apply your own tiles to colour match.