Nice new ceramic 4/5 pin sockets for British tube types such as PX25, PX4, ML4, AC-P etc, with plated brass contacts for good tight contact with valve pins. These fit a 1 to 1 1/16 inch (25-27 mm) hole and the bolt hole centres are 1 3/8 inch (35 mm) apart.
This item is shipped from Britain, in North America or Asia please allow 2 to 3 weeks for delivery. (Note that both 4 and 5 pin - B4 and B5 based - British valves use the same socket, the 4 pin ones just don't use the center pin) . Price is per socket. Offers considered on quantity 25 or more.