Want to replace your nine pin tube socket with a seven pin socket to fit 6C4, 6AQ5, 6X4, 6AV6 and other tubes? This little assembly will get the job done fast. Socket has white ceramic body with gold plated contacts. Socket screw mounting centers .892". Fits an approximately .630" hole in your chassis but you may have to do some Dremel work to clear for the mounting screws and nuts. Stainless steel adapter plate measures 1.692 X 1.411".