For Besson Sovereign model 967 euphoniums with upright bell, 3 piston valves in the right hand & 4th valve in the left. Also fits similar knock-off models from other manufacturers. Designed to wrap around the valve piston. Velcro enclosure.
Dimensions: • 5-7/8 inches wide • 4.5 inches high. • Cutouts are 7/8" wide, 1-3/8 (L) and 1.5 inches (R) deep