YAMAHA Wind Instrument Maintenance Kit - French Horn

This is a maintenance kit for brass instruments made by YAMAHA, specifically for French horns.
It was purchased about a year ago (April 2025) when my child entered junior high school, but the contents have never been used.
The package has been opened, and there are some slight marks from where name stickers were applied and then removed.

- Brand: YAMAHA
- Contents: Brass instrument maintenance supplies
- Storage: Comes with a dedicated bag
- Color: Bag: Black
- Accessories: Maintenance cream, brush, cloth, parts, etc.
- Size: Pouch size

This is the product.
https://www.amazon.co.jp/ヤマハ-YAMAHA-管楽器お手入れセット-日々の手入れに必須のアイテムをセット-初めて管楽器を演奏する時、新しく楽器を購入する時などに大変便利/dp/B0DK8879L3/ref=mp_s_a_1_2?dib=eyJ2IjoiMSJ9.EeXrI0LMVP-g2SWI-_vw80z-SFFjORrjs_uWc2iiHjPzwhWMA6G0o7hhIRELdC2uaEf5OgK8ZYCjl1W7jqii30X0v79ykCK6bcBlCKjJisp-hAOrYYrzsLEYgWaFAfra9OITuHZvrWtbYqo9vqBqpGasff8ZrlRlQF25QVMvE-hYgukbIOZPBRWgMdjGetKnBGv2YYKyaT0yFZZ_KWMreQ.-06nrJuxOyFEUNc2R1OnBOlaUQhdbu3mqf_F2-azYbc&dib_tag=se&keywords=ホルン+お手入れセット&qid=1775954594&sr=8-2

Thank you for looking.