Ceramic 7 pin (B7G size) socket with tube shield included. New production. Fit standard 5/8 inch hole. Shield fits tubes such as 6AU6, 6BA6, etc. 7pincershield$2.45 Triode, USA Customer Service M-F 9AM-4PM CT 1-800-774-3201 Email us Anytime: questions@triodestore.com