Hinges for finger-protective garage door only. Thinckness: 2mm. Finish: Galvanized or prowder-coating. International standard hardware The hardware is made in accordance with international standard, thus, our products satisfy with relevant Chinese and international standards... Selecting high quality steel Thyssen Krupp Group The hardware, such as guide rails or gemels, select zero spangles super zinc coated steel plate produced by Thyssen Krupp Group (one of the biggest world's steel manufacturer). It is anti-rust, durable and beautiful. Multiple surface treatment methods Standard zero spangles super zinc coated steel plate is available for the hardware, such as guide rail or gemel. Special color plastic coating is also adopted, such as the white electrophoresis, black electrophoresis, white plastic coating and black plastic coating. Strict craft The hardware is processing in accordance with strict craft; Therefore, with good precision and appearance, it ensures that the garage door is silent, smooth and reliable while running. Excellent balance system We configure appropriate torsion spring balance system for each set of the door after precise calculation. with this technology, our garage door is operated under balance condition and its using life is prolonged effectively. Break-resistant protection It designs to prevent against sudden falling of door caused by breaking of the tension spring.