Bass trombone mouthpiece. Greg Black 1/2G medium weight. Please refer to the manufacturer's website for specifications. Please note that this is not the so-called "1 1/2G". The throat is standard (not .312). Multiple photos will be posted later. (Please comment if you would like to see them) There are scratches on the parts that come into contact with the instrument, but there are no dents. The original box is missing, so it will be shipped in a different mouthpiece box. Please feel free to ask any questions in the comments. No returns or exchanges, please.