When I got my SX90 tenor in early January it came with a stock "Jazz" mouthpiece. I gave it a try. Two or three notes later I thought the mouthpiece was an absolute joke. Yesterday I bought a SX90R alto and told the seller to just keep the Jazz mpc., I had no use for it. Well, it was in the case when I got the horn - seller forgot to remove it, or just didn't want it. It is obviously not hand finished and appears to be made of plastic. But I gave it a try because I was in the mood for a good laugh. Well, what do you know...the alto version of this mouthpiece is actually very good. I spent an hour with it and might even use it on tonight's gig.