Building a Super Lead clone? Here's a complete set of the tube sockets and 'bear trap' tube clips you need for four octal based power tubes and three 9 pin preamp tubes. Octal sockets top mount through a 1" hole in the chassis, 1.5" mounting centers although the slotted holes allow for some flexibility. Bear trap tube keepers are nickel plated spring steel. The preamp tube sockets top mount through a .710" hole in the chassis with 1 and 1/8" screw mounting centers and feature a white ceramic body with tinned contacts as well as a spring loaded bayonet tube shield.