Discontinued Tenor Trombone Mouthpiece for Large Bore 【1C】 ・Comparison to Greg Black 1 ・Rim Inner Diameter: 26.92mm ・Cup Depth: Medium ・Bore Size: 7.19mm Although the inner diameter is large, a wide range can be played efficiently. Due to the slightly wide tone, a warm sound can be obtained in the brass low-frequency section. Silver-plated finish