Bore: 13,89 mm.

Bell diameter: 216 mm. (Bellflex)

Inner slide: cromed brass

Outer slide: silver plated brass

Silver plated copper bell upon request

Model #TB5310 (screwed)

Bore: 13,89 mm.

Bell diameter: 216 mm. (Bellflex)

Inner slide: cromed brass

Outer slide: silver plated brass

Double screw detachable bell

Silver plated copper bell upon request