Purchased 10 years ago at a musical instrument store in Tokyo for 30,000 yen. Brand unknown. Used for home storage of a bell-cut horn. Never taken outside. I am selling the case because I am selling the instrument. Compatible with one-piece horns (should fit most horns due to the soft case design). Lightweight. ■ Bell diameter: Approximately 36cm ■ Pocket: Approximately 36x31cm (A4 size fits easily) ■ 2cm thick sponge used on the inside ■ Core material in the bell section ■ Includes a shoulder strap, allowing for shoulder carrying. *We do not provide information regarding compatibility, storage confirmation, or measurements for specific instrument models. Please understand this beforehand.