HR-30C4 Rim Inner Diameter: 17.28mm Throat Diameter: 3.98mm Features: A medium rim inner diameter and U-cup contribute to a sound with a sense of speed. This standard model offers moderate resistance and a powerful, rich sound. Standard Series List Price: ¥6,380 (tax included) Please refer to the photos for details. Accessories such as the box are not included. Please understand that this is a used item before purchasing.