Specifications: .218" wire size, 2" inside dimension, 26" length. Enhanced Quality: Crafted from heat-treated spring steel coils with aluminum cones, utilizing electrophoretic coating for remarkable corrosion and abrasion resistance. Successfully passes salt spray tests lasting up to 300 hours and can endure a minimum of 16,000 cycles. Package Includes: A set of Garage Door Torsion Springs (Left & Right), two 17.2’’ Non-Slip Winding Bars, anti-slip Gloves, and an Installation Instruction sheet. When choosing a replacement spring, it's essential to match the wire diameter, inner diameter, and length with those of the original spring. This guarantees a proper fit and the best performance. Installation Note: Although our garage door parts are user-friendly, for optimal results, we highly recommend professional installation. If you lack extensive experience in garage door parts and hardware, it's best to consult with an expert to prevent complications. Blesseras 218-26 Garage Door Coated Torsion Spring Set with Non-Slip Winding Bars, Electrophoretic Coated Coil, 1 Pair, .218 x 2'' x 26''