GCC concealed overhead door closer cam action odc 960 ce marking concealed in door and concealed in transom. Suitable for wooden, alumnium and steel door panels. Architectural and commercial applicaion. Track arm mechanism and cam action with thermo-constant valve. Power adjustable force en 2-4. Door width 1100 mm. Door weight 80 kgs. Tested for 500,000 cycles as per ce. Body of precision die casting aluminium alloy. Complete with standard arm fittings for non-hold opening.