YAMAHA trombone mouthpiece, model 51C4L-GP, featuring a combination of gold and silver plating, compatible with large bore trombones. While there are no major visible scratches, there are minor scratches and scuffs from use. Please understand that this is a used item before purchasing. - Brand: YAMAHA - Model: 51C4L-GP - Type: Trombone Mouthpiece - Material: Gold and Silver Plating - Size: Large Bore Features: YAMAHA trombone mouthpiece. Custom series with gold plating even on the inner diameter of the mouthpiece. It has a slightly shallower cup than the 51, enabling powerful playing. Rich tone across the entire range. Suitable for symphony orchestra players. Large bore (large shank). Specifications: ■ Mouthpiece ■ For trombone, large bore ■ Custom ■ Gold Plate ■ 51C4 ■ Rim Inner Diameter: 25.23mm ■ Throat Diameter: 6.92mm