POLLAK FUEL TANK SELECTOR SWITCH -- Electric; 0.38 in. I.D. for fuel supply, 0.31 in. I.D. for return lines; Includes installation sheets; 6 ports including returns; Maximum fuel system pressure of 65 psi; Draw 0.5 amps max at 12 volts; Designed for use in applications which involve in-tank fuel pumps, not exceeding the rated pressure of the valve; Requires connector part number 42-203 and toggle switch part number 34-592.