Thank you for looking. This is a Monette Prana TT5 (large bore) trombone mouthpiece. - Model: Prana TT5 (large bore) - Rim size: 5 It has been used a few times and has been cleaned. The gold plating is in good condition and shows no signs of use. Returns due to a mismatch in feel are not accepted. Thank you for your understanding. I am also selling a Monette Prana TT5L (large bore), so please take a look at that as well. ♪ Update 3/17: The TT5L has been sold. Please consider this one soon as well.