【Seifert SB4T】 Inner Diameter: 17.00 / Bore: 4.00mm Cup Depth: MF (Slightly Shallow) Rim: MB (Slightly Rounded) Shank: American Shank Easy to produce high notes and has a good sound. I used it with a YAMAHA 87D. I use an SB4, so I've only used this a few times, and it's relatively clean. Price negotiations are possible.