Elgen's press-on hinge and cam (H) is used to provide easy access into rectangular ductwork. Double paneled with front and back metal plates and one insulation.
Elgen Access Door With Press On Frame, 6 x 6 in Frame, Fiberglass Insulation, 4 in-WG, 2 Cams, 24 ga Gauge, Steel, Galvanized, 6 in Length, 6 in Width