New ceramic chassis mount 9 pin type (British terminology " B9A ") sockets. Have 1 1/8" (29 mm) mounting hole centers, fit 7/8" (22.5 mm) chassis hole diameter with plated pins. Shields fit medum-short 9 pin tubes such as 12AX7 , ECC83 , ECC82 etc. Price is per socket. Offers on this item considered for quantity 50 or more. This item is shipped from Britain, in North America or Asia please allow 2 to 3 weeks for delivery.