The UB16 is a universal roof vent for use in most tiled and slated pitched roofs without the need to identify the make or design of the tiles or slates. The unit comprises a streamlined hood on a circular upstand with a 500mm x 500mm Ubiflex flashing skirt. The upstand protrudes below the Ubiflex skirt to form a 160mm diameter penetration sleeve. The free vent area of the UB16 is 20,000mm2 and it has an integral mesh to stop the ingress of large insects and vermin.If a matching terminal is required the UB41 should be used. Product Specification Material: Ubiflex skirt around PVC-u upstand with streamlined box hood. Roof Finish: Profiled tiles and thick slates. Colour: Anthracite. Components:500mm x 500mm Ubiflex flashing sheet with central vent and flat box hood (UB5 type) with integral insect inhibitor.