This Patented "U" shaped design is to provide a low Profile Rack that is easy to set up, and tear down. Simply slide your drums off of there mounts, and you can pick it up and carry it away. Tube size is the standard 1 1/2" diameter. You will be able to use any clamp from your favorite manufacturer. This Rack can fit over a 26" diameter Bass Drum, and has a Silver Powder Coated Finish.