Applicationfor Universal Rear Weld-On Triangulated 4 Link Suspension Kit with Two 2500 Air spring Bags & Rear Air spring Bag Mounts; Compatible for Ford F150/F250, compatible for GMC Sierra； Compatible for Chevrolet Silverado; Compatible for Dodge Ram 1500 2500 3500, etc; for Most Pickup Trucks, Hotrod, Ratrod or Classic Car with 2.75\" Axle Tube.SpecificationPackage Includes: 4 x Heavy Duty Steel Bars 4 x Zinc Plated Steel Rod Ends W/ Urethane Bushings 2 x Steel, Weld-On Triangulated Frame Mounts 2 x Steel, Weld-On Lower Axle Tube Mounts 4 x Steel, Weld-On Center Link Axle Mounts 2 x Steel, Weld-On Side Frame Mounts 8 x Button Head Bolts with Nyloc Nuts 2 x Weld-On Lower Axle Bag Mount 2 x Weld-On Upper Frame Bag Mount 2x Standard 2500 Single 1/2\"npt Port Air Bags 4 Link Bar Dimensions: Tubing Outside Diameter :1.25\" Tubing Thick Wall :156\" All Four Bars :24.00\" (Center To Center Adjusted All The Way In) Specs of bag: Diameter: 6\" Extended:8\" Closed:2.75\" Air spring bag capacity: 2500LBS 2 smaller bolt holes diameter: 0.3\" 1 bigger bolt hole diameter: 1/2\"NPT Two Top Mounting Holes : Approx 1-3/4\" from Eye to Eye Bottom has One Mounting Hole in Center All mounting holes are 3/8\"-16 UNCFeatureProvide better handing and comfort ride for you. Design for comfort suspension Heavy duty double convoluted crimpedNoteInstructions Are Not Included We Recommend Professional Installation Please feel free to contact for whatever we can help!