These tubes are brand new, genuine JJ Electronic 7591 tubes from the Slovak Republic and come in factory retail boxes. The quad is factory matched and burned in, with results on each box. They have beautiful tone with great reliability. Perfect for HH Scott and Ampeg amplifiers.

Each tube is 3-1/8" high, measured from the bottom of the base to the top of the tube (this measurement does not include the height of the pins). This tube has the same glass envelope as the JJ 5AR4/GZ34 and the 6V6.

Buy with confidence!