Thank you for viewing. I purchased this for my child, but they never used it, so I am offering it for sale. This is a device to help muffle the sound of an ocarina. ・It can be attached to most ocarinas, but it seems there are some that it won't work with. I am not familiar with ocarinas, so I am unsure. Detailed Information 【Basic Package Contents (what is included)】 Two mouthpieces Attachment piece (main body) Five stoppers (with case) Adapter #Ocarina #Fukerun #Muffler