Price reduced! Trombone Mouthpiece Brand new, unused No brand Small bore Likely a Bach 5 to 6-1/2 size (estimated visually). It came with the instrument when I bought it, but I've never used it because I already have a mouthpiece. I only took it out of the bag to take the photos for the listing. The texture and material seem to be the same as name-brand mouthpieces. Recommended for practice or beginners.