Preset on pressure: 40 psi; the contacts close at this pressure to send power to the motor/pump. Preset off pressure: 60 psi; the contacts open at this pressure to shut power off to the motor/pump. Adjustable pressure: Instructions are located under the lid of the pressure switch for adjusting pressure. Max pressure: 80 psi Min pressure: 20 psi Can be wired for single-phase or three-phase applications. Rated for 115V or 230V; at 115V single-phase it handles 1.5 HP, at 230V single-phase it handles 2 HP, and at 230V three-phase it handles 3 HP. Color: Gray Material: Metal Quantity: 1 piece Package Included: 1 x Water Pump Pressure Control Switch Package content includes only the items listed above; other products are not included. Note: Lighting and display differences may cause the color in the image to vary slightly from the actual item. Measurement may vary by +/- 1-3 cm.