Coated Garage Door Torsion Springs With Cones 7 & 8' High Doors Our Made in U.S.A. High Quality Coated Torsion Springs are factory coated black for smoother, cleaner operation and also corrosion resistant and oil tempered for longer life. For use on doors 7' or 8' high doors with 4" standard lift drums. Engineered for maximum application range. Minimum 10,000 cycles, at +/- 7.5 lbs of target door weight. Springs are made of steel coils with aluminum cones. Engineered For Maximum Application Range. Minimum 10,000 Cycles, At +/- 7.5lbs Of Target Door Weight. Springs Are Made Of Steel Coils With Aluminum Cones. Both Winding And Stationary Cones Are Installed. Black Coated, Oil Tempered Wire Provides A Clean Durable Finish. Clear, Easy To Read Spring Markings For Easy Identification. Top Quality Made In USA. See Our Other Listings For Coated Garage Door Torsion Springs