Frost Trumpet/Flugelhorn backbore (cut for screw sleeves) raw brass

Description

Condition is New.
Shipped with USPS priority mail
These will fit all standard trumpet screw tops (warburton, pickett, frost, black, etc.)
All Backbores have been cut to fit Frost Custom Brass Screw Sleeves
You MUST have a Frost sleeve to use this back bore (those are sold as a separate item)
This is intended to be used with a Flugelhorn top (in a trumpet).
The overall length has been adjusted for intonation purposes.
23 throat
Eliminates the need to bring a 2nd horn to a gig or rehearsal.
Great for Jazz playing.
This is threaded to accept standard tops (Frost, Black, Warburton, Pickett, etc.)
Yes, you must have a Frost Screw Sleeve.
No, other sleeves or couplers won't work with this.
Barely used. Play tested only.
Absolutely no refunds or returns for ANY reason including failure to read this details box or comprehend the English language