YAMAHA 52E2 Bass Trombone Mouthpiece This mouthpiece was given to me by an acquaintance. It's not listed on the manufacturer's website, so I don't have the details, but I believe it's a bass trombone mouthpiece. In terms of size, the rim is about the size of a Bach 3G, and the cup is quite deep. It produced a deep, bass trombone-like sound. I'm not a bass trombone player myself, and I have no use for it, so I'm selling it. I recommend it for students who are starting bass trombone in school or for those who want a bass trombone mouthpiece to use as a backup. It's a used item, so there are scratches, but no dents. Please understand this. Considering the condition, I've priced it affordably, so please consider it.