Offered is a pair of E F Johnson Porcelain Wafer Sockets type 122-237. These are 7-Pin Giant sockets for 813 tubes and others. Unused with clean wiring lugs. Wafer Sockets are insulated with grade L4 Steatite with top and sides glazed, underside impregnated in conformance with Army/Navy specifications. Brass with steel spring cadmium plated contacts. Suitable for transmitting tubes where secondary voltages can get quite high. Suitable for audio use too. Mounting holes are at the corners with centers at 2 11/16 inches in center measured diagonally. Pick up the sockets for your own DIY projects. Mouse over the photo images to zoom in. NO RESERVE!! Thanks for looking.