The Trombone Bushing/Shim Kit provides an extra pair of bushings with screws and three sets of shims for use with the Neotech Trombone Grip™. It's great for musicians with a second instrument and who want to use the Trombone Grip™ with it. The bushing remains on the instrument so you can move the grip to a second instrument in a matter of seconds. The kit is available in three options: Straight Brace, Gusseted Straight Brace or Curved Brace. This is the curved brace.