This is a 15-inch Sabian Groove Hat. It has a unique depth and comforting feel, and the closed and open hi-hat strokes are pleasing to the ear without being harsh. I think it shines the most in jazz and pop music, but it's also a reliable presence that provides a solid bottom end for rock. I got it from an acquaintance a while ago, but I haven't been using it, so I'm offering it to anyone who would like to have it. Price negotiations are welcome.