This intermediate trombone is loaded with professional features! The traditional Yamaha style semi-open wrap yields airflow throughout the F-attachment. Players are more comfortable playing the YSL-448G trombone because its superb weight distributions makes it easier to hold. The inner slide of the YSL-448G is chrome-plated nickel silver. The outer slide of the YSL-448G is yellow brass. 8-1/2" gold brass bell.