VEVOR Garage Door Torsion Springs, Pair of 0.218 x 2 x 23inch, Garage Door Springs with Non-Slip Winding Bars, 16000 Cycles, Gloves and Mounting Wrench, Electrophoresis Coated for ReplacementPrecision Engineering for PerformanceUpgraded And Improved TechnologyDurable Beyond CompareQuick & Hassle-FreeSafety FirstSpring with ElectrocoatingService Life: Approximately 16,000 Cycles (opening + closing),Net Weight(Include accessories): 18.30 lbs / 8.3 kg,Spring Size (Wire Dia. x Inner Dia. x Length): 0.218 x 2 x 23inch / Φ5.54 x Φ50.8 x 584.2mm,Item Model Number: GZ-23,Rotation: 1 x Dextrorotary + 1 x Levorotary,Main Material: High Carbon Steel 82B + Cast Aluminum ADC12