The new Haus Profi Wakaflex Uni-Outlet from Klober has been designed to provide a flue for gas boilers and can be used on pitches from 17.5 to 45. Available in six diameters from 25 to 125mm, it is made from durable heat, UV and shrink-resistant EPDM and is a cost-effective option for use with all types of clay and concrete tiles, slates and metal roofing systems.