This is a Tilz trumpet mouthpiece, model 1C. I purchased it two years ago, but I haven't had much opportunity to use it, so I'm putting it up for sale. The size is 1C, which is said to be the same size as a Bach 1C. The current market price is 12,623 yen. There are some scratches on the shank and rim, but they are not at a level that would interfere with playing.