YSL-620/640 Tenor Trombones with F Attachment

YSL-620 YSL-640
Key Bb/F Bb/F
Bell Material Yellow brass Yellow brass
Bell Diameter 214.4mm (8 1/2") 214.4mm (8 1/2")
Bore Size L: 13.89mm (0.547") ML: 13.34mm (0.525")
Outer Slide Material Yellow brass Yellow brass
Inner Slide Material Nickel silver Nickel silver
Finish Gold lacquer Gold lacquer
Mouthpiece SL-48L SL-48S
Case Included Included