This Lomanco vent turbine set has been designed for use on pitched roofs that have clay tiles or are metal profile roofs. A flexible universal base follows the shape and curve of the roof allowing the base to be installed from a 0° - 45° roof pitch. The set combines a powerful Lomanco turbine, a BIB12, with a universal base that can be installed on clay-tiled and metal profiled roofs. The turbine head requires no maintenance and has a lifetime warranty for increased assurance of the durability and life expectancy - please note, this lifetime warranty applies to residential use only. In instances where a Lomanco turbine has been installed for commercial use, the product is covered by a 15 year warranty. The universal base comes with a 2-year warranty. This set includes: Lomanco BIB12 12” turbine head Universal base