New Czech JJ 5U4G tube original authentic precision paired rectifier tube straight generation 5Z3P 274B 5U3C GZ34 5AR4 tube
Brand new original Czech JJ 5U4G instead of 5Z3P / 5U4GB imported rectifier tube for tube amplifier
Tube size (refer to the figure below): height H = 11.8cm, diameter W = 3.7cm