Yamaha MP BL YEO Signature GP, Bass Trombone, Douglas Yeo, developed with famous Yamaha artists, rim and inner bore gold plated
Rim Inner Diameter: 28.72㎜
Rim Contour: Semi-flat
Rim Thickness: Semi-thin
Cup Depth: Semi-deep
Throat: 8.00㎜
Backbore: Semi-wide