This is a 36 Volt Solenoid Club Car, 4 terminal, number 120 series tower style solenoid with silver contacts. It is for Club Car electric 1999-03 golf cart models.
The solenoid is responsible for converting electrical energy into mechanical energy in your golf cart. The solenoid provides the electrical energy necessary to activate the golf carts ignition system by being the conduit between the golf carts battery pack and controller. Without a properly functioning solenoid, your cart might not run as intended.