4 Packs Air Suspension Spring Bag Standard 2500lb 1/2"npt Single Port Heavy Duty Air Ride Suspension Air Spring Bag Universal air suspension bags compatible with F150/F250, Sierra, Silverado, Ram 1500/2500/3500, and other similar trucks. Confirm the air spring bag parameters (height, diameter, bolt specifications) before purchasing. Item Specifications: Min height: 65mm Max height: 175mm Working stroke: 110mm Loading capacity at 3.0bar: 2.88KN Loading capacity at 7.0bar: 7.25KN Single air port size: 1/2NPT Install hole size: 3/8-16UNC Plate diameter: 113mm Air spring bag body diameter: 145mm Capacity: 2500LBS Features: Heavy-duty double convoluted crimped design for safe and comfortable load capacity. Holds up to 350 PSI. Tested over 3 million times. Air-tightness tested. Provides improved ride control. Designed for comfort suspension. Quantity: 4 pieces per set (for rear or front left/right). Compatibility Disclaimer: This is an aftermarket replacement part. Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.