ITEM NAME:GZC8-Y-6 Ceramic PCB Mounting Tube Description: For KT88/6550/EL34 6P6P 6V6 6N8P 6SN7 and other 8-pin tubes Great for repairing vintage amplifiers, HAM radio, Hifi and more It's vintage electronic socket for audio testing. Bottom base diameter 24.5-24.8mm, opening Hole 26mm, fixed diameter 47mm Use for PCB board installation Package Includes: 1 Piece 8 Pin Vacuum Tube Sockets SKU: ALU0022706368002792.Use for PCB board installation. 1 Piece 8 Pin Vacuum Tube Sockets. SKU: ALU0022706368002792.