Euphonium Protector Strap Hand Strap This is a protector to support the euphonium. It was used in a club, so it's a little dirty, but it works. Installation image on the first photo. Type A / YAMAHA Willson [Product Description] Euphonium players often unconsciously have poor posture due to the weight of the instrument, but by using this product, the burden on the arms is reduced, and posture is stabilized even during long standing performances. Maintaining good posture will directly lead to efficient fingering and stable tone. By significantly reducing the burden on the left hand, it prevents slipping due to sweat and allows for playing in a comfortable posture. It reduces the burden and can be expected to stabilize the embouchure.