Yamaha YCL-450NM Duet+ Intermediate Clarinet YCL-450NM Duet+ Intermediate Clarinet Featuring a bell shape and barrel design similar to that of the V Series, the YCL-450NM offers a surprisingly 'professional' sound with an easy response The new bell design gives improved intonation and projection, especially in the all-important lower register, while the new barrel enhances the 450's response, flexibility and tonal focus Patented Duet+ technology provides the added benefit of durability to this clarinet The ABS resin injection-molded upper joint inner bore significantly diminishes the likelihood of cracking