Antoine Courtois CHALLENGER II 420BO-II Tenor-Bass Trombone (Large Bore) - Model: CHALLENGER II - Model Number: AC420BO-II - Bell: Yellow Brass Bell - Slide: Medium Weight Slide, Yellow Brass Mouthpipe - F Attachment: Open Wrap Rotary Valve - Case: bam X Light Semi-Hard Case Thank you for looking. This is an Antoine Courtois CHALLENGER II 420BO-II Tenor-Bass Trombone (Large Bore). It has been used very little and is in like-new condition. There is almost no lacquer wear or scratches. The only accessory included is the case. We do not offer trial plays. We also do not accept returns. If you have any questions or require further information, please leave a comment. We will do our best to accommodate your requests.