Trombone - Hickey's
Trombone Mouthpiece Pouch, Double w/Zipper Closure - camo (A222CAMO) ... Double layer fabric instrument bell cover. Ideal for alto & tenor horns, tenor trombone, baritone sax. Size 7 to 8.75 inches (178 to 222mm). ... A bell cover acts as a face mask for your horn and helps slow the spread of water droplets and aerosols from the instrument.