For use within NAMCO 20 Year Reunion MS Pac-Man/GALAGA Cabinet. Nylon and solid steel construction. Microswitch reliability tested to 10,000,000 cycles. Spring return-to-center. Round 1.25" red knob offers familiar feel like original. Rugged construction. 4-way action. For use on metal control panel only. Shaft size is .394" diameter. Note: This joystick does not have the same mounting plate as the original Pac-Man games.