There are many different types of roofing materials, and solar collectors are not always mounted on an angled surface, therefore, the frame needs to suit the specific application. Sunda supplies three different collector frames for use with 8- tubes, with 16- tubes and with 20-tubes. Frames consist of two side rails and a top and bottom support assembly. All frames are made of stainless steel and are designed to be quick and easy to install on all roof types. Sunda offers additional brackets for the mounting of collectors on different roofs.