This is a replacement cage for any of the "Cage Series" THD Amplifiers, which includes the UniValve, BiValve-30 and Flexi-50 amplifier heads. It includes the logo and the attached, captive thumb screws. This is the newer, taller version, which accommodates the taller KT66 power tubes which the earlier, shorter cages did not.

All THD chassis components are made in the USA.