4 - pin Porcelain ~ Ceramic sockets
( New Stock ~ Made in China )
These are High Quality 5 - pin Porcelain ~ Ceramic tube
sockets.
These tube sockets are used for 2A3, 4C35, 6A3, 10, 10Y, 24A, 26, 45, 71A, 80, 99, 199, 299, 274A300A,
300B, 811, 811A, 8008, NL8008, Tubes amoung many others.