Features： Diameter : 31mm Increase height and Protective effect Outstanding soldering taken in every adapter. Gold plated pins for long life，Tough gold pins with a thick gold plating. Octal Gold plated tube saver adapter for EL34 GZ34 KT88 6V6 6L6 5Z3P 6SN7GT Package Included: 4 x 8Pin Octal Socket Saver