※This is not for euphoniums. Purchased at 25/9 Euphonium Store. This is a water tray for baritones. To use, attach the protrusions under the 1st and 3rd valves. It is lightweight due to being plastic (approx. 10g). The original rubber came off quickly, so I purchased and attached separate rubber. I still have about 500 of these, so I will include them. (This rubber tends to loosen when it absorbs moisture, so it needs to be replaced frequently.) Excerpt from the following HP: ------------------- This new SB tray is very lightweight (10g) and non-metallic, with small hooks at the ends of two protruding tabs that clip inside the lower caps of valves 1 and 3, providing a very secure and reliable grip. It is very easy to remove and replace to drain water, and there is also a very small groove on one end, so you can tilt the instrument to one side to drain water if necessary. Guaranteed not to vibrate! ------------------- Baritone Baritone horn Baritone horn BESSON YAMAHA Water pot