This Honeywell MP909E1018 Pneumatic Damper Actuator is a reliable and efficient choice for your HVAC and refrigeration needs. With a unit quantity of 8-13 PSI, it is suitable for a variety of applications. The actuator is powered by pneumatic pressure, making it a great choice for those who prefer a low-maintenance option. The California Prop 65 Warning applies, and the actuator is designed to meet the needs of those who are looking for a reliable and durable option.