The Johnson Controls T-4002-203 Pneumatic Thermostat is a reliable and efficient control for HVAC systems. With a direct acting design and compatibility with Johnson Controls brand products, this Single Temperature thermostat offers accurate temperature regulation for heating and cooling systems. The compact dimensions of 4.200 inches in length, 3.700 inches in depth, and 0.3500 pounds in weight make it easy to install in various settings. Additionally, the item is covered by a 1-year manufacturer warranty, providing peace of mind and quality assurance for your HVAC needs.