Easy Heavy Lid Lift - Engineered with industrial-grade gas spring tech, this 20" 67lb gas strut delivering smooth and consistent lifting force that lets you effortlessly open 40-80lbs heavy lids like tool box, truck bed or RV beds solo, eliminating back strain and streamlining daily access Product Info - Overall length: 20.55", extended: 20.00", compressed: 12.13", 20" gas shocks fit 30-40 in wide lid and ensure perfect leverage geometry with no dead zones or over-extension risks, keeping your lids positioned at the ideal angle for loading and accessing gear without sudden slamming or obstruction All-Weather Durability - Crafted from premium Grade 45 carbon steel with mirror chrome plating and wear-resistant hydraulic oil, perform reliably in -40°F to 110°F extreme temperatures, resisting leaks and pressure loss far better than standard struts to deliver year-round lift support in Arizona heat or Minnesota snow High-Quality Material for Longevity - Built with industrial-grade 45# high-carbon steel, multi-layer chrome plating and premium anti-wear hydraulic fluid, these struts endure 50,000+ compression cycles without force loss, resisting rust and oxidation to outlast alternatives—install once and avoid costly replacements Complete 2-Pack Kit - This package includes 20-inch 67lb gas springs*2, mounting brackets*4, M8 nuts*4, Instruction manual*1, Coustomer Service card*1 (mounting screws for brackets are not included), enabling installation in under 30 minutes with standard tools to prevent lid warping and extend hinge life