Eb-Alto trombone ABS body Fibreglass slides Bell 7" Dual bore: 12,32-12,7mm Extra light: approx. 0,7kg With bag and synthetic mouthpiece, small shank The new Jiggs Whigham pBone brings a fun and intriguing twist to the traditional trombone. With its plastic construction, this lightweight instrument sounds remarkably like typical brass trombones.