You're looking at a used Benge 12c small shank euphonium, trombone, or baritone mouthpiece.  It's in ok shape, its fairly tarnished. The shank at the bottom is denting a little, but that can be fixed for little to nothing and the rim is pitted a little but you can work around that.  Payment will be expected within 48 hours of the auction.  I will no ship internationally. I've described this item as accurately as possible, so I will not accept any returns.  Happy bidding!