The Clopay Extreme™ Series combines high-strength durability with the ability to open at 24” per second. Powered by the robust LiftMaster opener, the Extreme™ Series- commercial doors are a great fit for emergency facilities, distribution center warehouses, car dealerships and much more.Manufactured with heavy duty hardware, these low maintenance sectional doors boast five times the spring life of an average commercial sectional door for optimal performance.