Therafin’s Jazzy Steel Channel Bracket is attached to a Therafin half tray that is made out of 3/8" clear polycarbonate. Polycarbonate is virtually unbreakable. The bracket slides the tray on from the front, and flips the tray up and out to the side for easy transfer. Bracket fits the Jazzy armpad with maximum dimensions of 3″ wide by 3″ tall in the front and 3-3/4" at the back. Trimline shape half trays have a straight outer edge that offers support for people with weakness on one side and allows more belly clearance.