Yamaha Silent Brass for Euphonium SB2X (Pickup Mute™ "PM2X" + Personal Studio™ "STX-2") Purchased in 2020, but I'm selling it because I've only used it a few times. I've disposed of the box. The mute itself will not be disassembled; it will be wrapped in bubble wrap as shown in the photos and packed in a cardboard box with other items for shipping. Please refrain from purchasing if you are sensitive to used items. ・Lightweight, compact mute ・Pitch and blowing feel can be adjusted ・Can be disassembled compactly ・"Brass Resonance Modeling" that reproduces the realistic sound of brass instruments