ApplicationCompatible For GMC Sierra 1500 AT4 and AT4X Models 4WD 2019-2026Compatible For Chevrolet Silverado 1500 Trail Boss and ZR2 Models 4WD 2019-2026SpecificationCondition: Brand New Minimum PSI: 5 PSI Maximum PSI: 100PSI Internal Jounce Bumper included: Yes Placement on Vehicle: Rear left and right Air spring--- Load capacity：Up to 5000 LBS Design height：180mm Stroke:100mm Max. Extended: 200mm Min. Compressed: 100mm Package includes（as the picture shows）: 2x Heavy Duty Double Bellow Air Ride Suspension bags 4x Upper and lower mounting brackets 4x Rolling plates Includes All Brackets & Hardware Needed to InstallFeature1、Stress Test Over 5,000,000 Times：Durable and Safe 2、Burst Pressure≥2.0MPa：High Compressive Strength and Less Noise 3、100% Air Tightness Guarantee 4、Temperature Range ≥ -40℃/ ≤ 70℃ (≥ -40°F/≤ 158°F)：Premium Natural Rubber Material 5. 4-Layer reinforcement construction: Enhances air spring load support. 6、Use high-quality steel with high load-bearing capacity and long life. 7、Excellent and practical bolt-on installation. 8、Safe carrying capacity and stability 9、Restore the original ride height and improve ride quality 10、Ensure our driving comfort and reduce tire wear. 11、Dacromet is a new surface treatment technology that has excellent corrosion resistance compared to traditional electroplating processes.