【Used】BEST BRASS Warm-up Mute for French Horn

I am completely retiring from playing the French horn, which I have played for many years as an amateur, and am offering the accessories I used.

This is a warm-up and practice mute for the French horn made by the Japanese company BEST BRASS.
It is designed for daily practice and use in hotel rooms before concerts.

I am listing it at a low price because there is a dent and scratch from accidentally dropping it.
There is also some rust and minor scratches overall, but I believe it will not affect its use as a mute.
Only the main unit is included; there is no case.

This is a used item that I have used for a long time, so I would like someone who understands this to use it. Thank you.