The 5M-3332 Caterpillar Cab Heater Switch Assembly is a high-quality heater control switch designed for use in Caterpillar trucks. Made in the United States by Caterpillar, this switch assembly is a genuine OEM part that ensures compatibility and reliable performance. The knob on the resistor allows for easy adjustment of the heater settings, providing convenient control over the heating system in your truck. Upgrade your vehicle with this durable and efficient heater switch assembly from Caterpillar.