Core Specification & Replacement Part Info: This 5-1/8 inch recliner mechanism spring (5.125 inch) is designed for recliner spring replacement, available in two types—mechanism tension spring and platform rocker recliner spring. It features 8 gauge wire, 35 coils, 180-degree offset hooks, 5-1/8 inch total length (3-9/16 inch width for platform type) and 4-3/4 inch inside hook length. Replacement part numbers: SMMT1B1X08, 92000707-00 Wide Compatibility: Fit for most North American recliner brands, for La-Z-Boy, Ashley, Lane, Flexsteel, Catnapper, Klaussner, Broyhill, Southern Motion and Homestretch. It is compatible with La-Z-Boy 55T & 55TH Platinum Lift Chair, universal for non-branded recliners sold at Walmart and Target, and matches the replacement standards of mainstream recliner mechanism parts Versatile Application Scenarios: The mechanism tension spring is suitable for recliner footrest extension, backrest angle adjustment, headrest and lumbar support auxiliary mechanisms, applicable to home recliners, sectional sofa recliners, office recliners, theater seating recliners, RV recliners and outdoor recliners. The platform rocker recliner springs (side/top mounting) are for rocker chair base support, fit for platform rocker recliners and vintage wooden rockers, sold in pairs as required Product Type & Adaptation Details: The mechanism tension spring comes with short neck/180-degree offset hooks, 4-3/4 inch inside hook recliner spring length and 35 coils, suitable for light and heavy-duty recliner mechanism repair. The heavy duty platform rocker springs are 8 gauge (9 turns), 5-1/8 inch long x 3-9/16 inch wide x 2-1/4 inch high, including mounting screws, and must be replaced in pairs to avoid rocking imbalance Material & Specification Compatibility: Made of carbon steel or 304 stainless steel recliner spring, with zinc plating for corrosion resistance; stainless steel models are suitable for humid environments such as RVs and outdoors. It fits recliners with 250-400lbs load capacity, 2.5mm regular wire diameter and 3.0mm heavy-duty wire diameter, with ±1/16 inch tolerance for overall length to ensure perfect replacement Optimal Comfort & Support: Experience superior cushioning and dynamic weight-responsive support with this set of recliner springs. These recliner replacement springs are engineered to precisely adapt to body movements, absorbing impact and reducing pressure points for enhanced comfort in your favorite chair Precision-Engineered Replacement Spring: Designed as the ideal spring for recliner chair or other furniture, each chair spring features a 5-1/8" total length, 3-7/20" coil length, 13/20" coil diameter, and robust 2.5mm wire thickness. The 180-degree reverse-opening hooks ensure secure installation and lasting performance Wide Compatibility: These versatile replacement springs for recliners are compatible with Lane, Lazy Boy, and Berkline recliners. Perfect for couch springs replacement, they also fit sofa beds, cribs, trampolines, fold-out RV beds, futons, and leather chairs Durable & Rust-Resistant Replacement Parts: Built from high-quality spring steel, these recliner springs resist rust and withstand long-term use without wear. They provide reliable replacement springs for recliners and other high-stress furniture applications, ensuring lasting structural support Easy Spring Replacement: Installing these recliner replacement springs is simple and flexible, requiring no tools under most circumstances. (Safety Tip: Wear gloves and eyewear. For difficult installations like couch springs replacement, use a spring expander tool or seek professional help for a hassle-free experience.)