This is a main tuning slide for a tenor/bass trombone made by Edwards, an American manufacturer. The material is gold brass. The shape is a single radius. It fits Edwards T350-E series and GETZEN 3047 series instruments. (Adjustment may be required.) There are no major dents, and it is still in good condition. There is some lacquer lifting and rust, which are common in American-made instruments. Please check the photos. It costs over ¥70,000 when new, and it's a part that is not often available. Please consider this opportunity. It will be wrapped in cushioning material and shipped to prevent any accidents.