massimo [Brand New, Unopened] Head Cover for Contrabass Color: Red This is a head cover to protect the head of a contrabass. It prevents scratches on the head when putting the instrument in its case. I am selling this because I have no opportunity to use it. Please see the following for details on the product: https://massimo-jp.com/products/%E3%83%98%E3%83%83%E3%83%89%E3%82%AB%E3%83%90%E3%83%BC Contrabass Double bass Wood bass