Thank you for viewing. This is a Kanstul mouthpiece compatible with Warburton, etc. The model number is 3. It is a copy model of Bach backbore 3. For detailed sizes, playing feel, and sound, please search on Net Brass. There are no major scratches or dents that would hinder performance. Please refrain from comments asking for a price reduction. Instant purchase is OK. If you are interested in used mouthpieces or new mouthpieces, please search on Net Brass. net-brass.com #Mouthpiece #Trumpet Type...Trumpet Accessories/Parts...Mouthpiece Type...Trumpet