4 pin Premium Gold Plated Ceramic tube socket 

• This is a premium quality 4 pin porcelain (ceramic) tube socket with gold pins.  
• The unique pin design holds each tube pin on all sides.
• The pin contacts more area of the tube pin, which greatly increases connectivity and gripping. 
• The pins and contacts in this 4-pin Ceramic socket are 24K gold-plated over copper.
• Chassis Mount on top or bottom.
• Hole diameter 27.00 mm, Mounting distance 35mm.
• Compatible with :2A3  45  50  27  5Z3  6A3  10  80  83  274A  300A  300B  801  811 UX4  VT52  71A etc.