The P72LA-1 is a double pole, single throw pressure control switch designed for use in HVAC systems. It features a dual scale range of 20 inches to 100 inches of water column and 100 psi to 425 psi, making it suitable for a wide range of applications. The switch is built with high-quality materials and is designed to provide reliable performance over an extended period of time. With its easy-to-use design and precise control capabilities, the P72LA-1 is an excellent choice for HVAC service technicians looking for a dependable pressure control switch.