This is a tenor trombone small 90 wrap tube 

Nickel ferrule for connecting our tenor wrap tubes together

There is nothing like the sound of nickel tubes! Two 80 tubes can replace the 45 and 90 tubes on an axial conversion for a cleaner look, and softer more sweeping curve for better air flow. 

 This is a tenor trombone large 90 wrap tube 

Used in tenor trombone wraps