These are direct replacements for your stock Shackle Hangers, except for the fact that they are made for all the abuse you can throw at them. Made of A50 Plate Steel and 2.0" x .25 Wall DOM. They are sold in pairs and come with bushings and sleeves. Available in 2 popular widths (OD with Bushings), 3.0" & 2.75", for 2.75", 2.5" springs. Measure your springs with the bushings installed to determine which you need.