We've been building these bump stop cans for over 20 years. They are often copied and knocked off. We have these CNC laser cut from USA DOM tubing and then weld the pinch bungs on that use 3/8" grade 9 hardware. They have a 2" ID and are designed for FOX, Bilstein or Sway-Away 2.0 bump stops. These require you to weld them onto the chassis/frame with additional gusseting. With some ingenuity you can build these to bolt on and off like we do with our rear Toyota model specific bump stop mounts. Sold individually Fits these P FOX bump stops: 980-02-311, 980-02-323, 980-02-022 and 980-02-091.