Please note that this item may be canceled due to circumstances. This is a listing for a Greg Black 0G Light (.312 #2) bass trombone mouthpiece. I liked it and kept it as a spare. Although listed as (near new), it has only been test-played and is in beautiful condition. Also, it is a bore size option. Please understand that this is based on my personal opinion. [Mouthpiece] ◯ Greg Black 0G Light ◯ Bore size .312 #2 ◯ Inner diameter 29.50mm ◯ Cup depth: deep Please check the catalog to avoid any problems. This is a brand that is rarely stocked in musical instrument stores, and as it is a bore size option, it is a mouthpiece that is difficult to find. Thank you for your consideration. I will ship as quickly as possible, but it will be difficult on weekdays, so please understand that shipping will be on weekends. #Trombone