The Yamaha YBL620G Professional Bass Trombone was designed with the budget-conscious in mind. The 620G Bass Trombone has a smaller bell size that offers excellent tone for the advancing bass trombonist. The YBL620G features an stacked double dependent rotor system in the key of Bb / F / Eb with an optional D slide plus a 9.5 inch gold brass bell for outstanding performance and resonance. The Yamaha YBL620G Professional Bass Trombone includes a case and mouthpiece and is available in lacquer (YBL-620G) finish.