This is the mouthpiece that came with the Hans Hoyer horn I purchased. The playing feel is similar to a JK 2DM, and I find it quite easy to play. I'm selling it because I haven't used it much, only trying it out a couple of times. There are some minor scratches, so please refrain from purchasing if you are sensitive to such things. Below are the catalog specifications: Hans Hoyer 8 ・Inner Rim Diameter: 17.20 mm ・Outer Rim Diameter: 25.47 mm ・Rim Width: 4.14 mm ・Rim Bite: Slightly sharp ・Rim Contour: Flat ・Cup Shape: V-shaped, close to U ・Cup Depth: 33.00 mm ・Throat Diameter: 4.20 mm ・Cup Volume: 2.89 ml ・Backbore Volume: 0.86 ml ・Total Volume: 3.75 ml ・Weight: 39.54 g ・Shank: American