GCC overhead door closer odc 680 ce marking surface mounted ideally suited for most common doors for architectural and commercial applications. Three different power adjustments en 2-4. Door width 850 to 1100 mm. Door weight 40 to 80kgs. Left and right-hand applications. Tested for 500,000 cycles as per ce. Body of precision die-casting aluminum alloy. High-quality steel components. Heat-treated steel rack and pinion. A built-in pressure relief valve for safety. Stable hydraulic fluid with low sensitivity to temperature changes. Complete with hold-open arm fittings.