Yamaha Marching Tuba Shield End tuba dings Designed for the YBB-202M, this new tuba branch protector provides protection from damaging blows on and off the field Field designed & tested, the Tuba Shield is constructed of heavy-gauge plastic and high-density foam with a lightweight, durable Cordura nylon cover It absorbs impacts and protects the bow from those annoying, costly dents Nylon straps and plastic clips help keep the Tuba Shield in place