VEVOR Garage Door Torsion Springs, 16000 Cycles, Pair of 0.25 x 2 x 30inch, Garage Door Springs with Non-Slip Winding Bars, Mounting Tool and Gloves, 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): 26.45 lbs / 12 kg,Spring Size (Wire Dia. x Inner Dia. x Length): 0.25 x 2 x 30inch / Φ6.35 x Φ50.8 x 762mm,Item Model Number: GZ-30,Rotation: 1 x Dextrorotary + 1 x Levorotary,Main Material: High Carbon Steel 82B + Cast Aluminum ADC12