Polished brass slide trombone. - Case: Includes a hard case - Material: Brass - Construction: Slide trombone - Finish: Polished - Accessories: Cleaning cloth, slide oil Thank you for viewing. I purchased this on Mercari but am selling it because I've decided to give it up. The mouthpiece was used a few times by the seller, and I have cleaned it before listing, but if you are concerned, I recommend using a different mouthpiece. The model number is unknown. It is a large-bore tenor trombone. I will include a trombone instruction book for anyone who wants it. Please comment if you'd like it.