Plastic header clamp bracket used to mount solar pool heating panels on a roof. The bracket is only installed on the top header of the panel. One or two brackets are mounted on each panel header. The bracket can be slide along the panel header allowing the bracket to be anchored into roof truss or just to be anchored into the roof sheathing. Two set screws are installed once the top and bottom are joined together. Brackets may be used with 1 1/2″ or 2″ panel headers. The included insert is used for 1 1/2″ headers. The bracket is held in place with two stainless steel screw with a sealant to ensure weatherproofing (sold separately).