This is an unbranded endpin cap for 3/4 and 4/4 cellos. It's a stored item for sale. It fit both my 8mm and 10mm endpins. Although it's new, I tried it on, so I've listed it as "Like New." Click here for other cello-related items: #WildRabbit_CelloList #Cello #Endpin #CelloParts Thank you for looking.