Berkeleywind have this perfect intonation Silver Alto horn is In Eb special for marching and Mexican Mariachi band use. This Series Eb Alto Horn offers the pro level player a high-performance instrument. The features a .469-inch bore combined with a silver leadpipe for a full, round sound. Also features an 8-inch upright laser-fused pluzuma-welded bell for continuous and even bell vibrations in all registers. this Alto Horn includes a Lux Nylon case and mouthpiece * Bell: 205mm (8") * Bore: 11.9mm (0.469") * Finish: Clear lacquer * Silver leadpipe * Mouthpiece: 38D4