Gold And Ceramic Nine Pin Noval Top Chassis Mount Tube Sockets For 12AX7, EL84 6CA4, 6DJ8 And Similar Miniature Nine Pin Noval Based Tubes. Glazed ceramic body. Gold plated saddle, gold plated contacts. Mounts from the top of the chassis through a .75" hole. Mounts to chassis with two machine screws, mounting centers approx. 1.125". Nice socket for building '60s British style guitar amps; these really take the heat of EL84s etc.