Bob Reeves "ZINGER (Doc Severinsen model)" trumpet mouthpiece. This mouthpiece allows you to produce high notes with a thick, core sound, just like Doc Severinsen. It appears to be in good condition with no noticeable damage. I really liked it, but I'm selling it reluctantly because I want another mouthpiece. Rim: 40.5 Throat: 27 Backbore: 692sl Cup: Slightly shallower than S Sleeve: 3.5 The standard ZINGER rim is 42 (inner diameter is about Bach 3C?), but it was too large for me, so I was looking for a smaller rim. I found this "40.5 ZINGER" used at a musical instrument store and purchased it. It feels like it's between a 5C and a 10-1/2C. The standard ZINGER backbore is said to be close to the tightest 692s by Bob Reeves, but this product has a slightly longer "692sl" and a backbore with even more resistance. Perhaps because of this, it gives the impression that high notes are quite easy to hit. The standard ZINGER throat is 28, but it has been changed to a thicker "27" to match the tight 692sl backbore, giving the impression that it has been adjusted so that the sound doesn't become thin even in high notes. It's truly an improved version of the standard ZINGER mouthpiece. I think some people may not have a sleeve, so I'll include a "3.5" sleeve as a bonus. It's unlacquered, but there are no noticeable scratches that would interfere with playing. No price reduction. This is a used item, so please refrain from purchasing if you are sensitive or concerned.