Yamaha YCL-221II Standard Bass Clarinet New Yamaha YCL-221II Standard Bass Clarinet Key of Bb -- Features a 2-Piece Matte Finish MMA Resin Body (Resistant to Temperature Change) Nickel Plated Bell, Neck Pipe, & Keys -- Improved Neck Angle Low Eb Key -- Machined Bore Includes Yamaha Student Mouthpiece & CLC-221II Case