Gottlieb A3 MA-303 and MA-430 Power Supply +5VDC 100 Ohm TRIMMER POTENTIOMETER (P1036). PCB layout is 5mm x 2.5mm. This is used in games such as Qbert and others. This is the exact fit OEM replacement. 1/2 Watt 250VDC, 20% tolerance, 3/8″ round trimpot, top adjust horizontal mount pot.