black T plates - nickle base. Very nicely balanced tubes. These rare high quality dual triodes from 50's feature superior sound quality and extended durability. 6H8C is a direct equivalent of the 6SN7, 6SN7GT tubes. Usage is about 250-300 hr. and have very low noise/microphonics. $70 for the pair shipped with CONUSA - Paypal prefered.
