This is a brass version of the "Leafleck." It was used on an alto saxophone. Made of brass, it enhances the resonance and connection of the sound. Several years have passed since I bought it, and it has taken on an antique appearance. There are black marks on the fixing rubber bands, but there are no problems with normal use. There is no original case, but I will include a custom-made case for carrying. I think you will be able to use it without any rattling. Thank you.