Korpa 
Bb Trumpet, Bell: Yellow brass, 4-7/8" , Bore: ML 0.459", Finish: Gold lacquer, Weight: Medium, Mouthpiece: TR-11B4
The two-piece bell of the YTR-2330 is crafted using state-of-the-art production methods, delivering a consistent, vibrant tone. The balanced weight and addition of an adjustable third valve trigger allows for a natural hand position and promotes proper playing technique, while the water key on the third valve slide adds to the ease of use and over-all playability of the instrument.
Yellow brass bell
The newly redesigned, durable yet light two-piece bell is made of yellow brass for optimal playability and to promote good technique and endurance.
New piston, piston caps and buttons
The picture shows YTR-2330S
Highly durable monel alloy pistons as well as newly designed piston buttons and bottom caps help lengthen the life of the instrument while also maximizing sound quality.
New tuning slides
The 2nd and main tuning slides are produced using the same method as high-end Yamaha models, which provides stability, a more refined tonal color and added durability.