Horn Mouthpiece Yacht-Car (JK) EX Model 1DM Outer Rim Diameter: 26.0mm Inner Cup Diameter: 18.0mm Throat Size: 4.2 Cup Shape: M U Cup Double Shank - Quoted from Watanabe Gakki This has only been used a few times, so it's in relatively good condition and clean. Available for immediate purchase. Please feel free to ask any questions you may have. If you have a desired price, please comment and I will consider it!