The Carrier 5H40-1051 Piston Pin is a set of three replacement parts designed specifically for Carrier HVAC systems. Made by the trusted brand Carrier, these piston pins are compatible with Carrier models and are essential components for maintaining proper function in your heating or cooling system. The unit quantity of three ensures you have enough spare parts on hand to keep your HVAC system running smoothly. Ideal for professionals in the HVAC industry looking to efficiently repair and maintain Carrier systems.