Pressure switch 26 140-175 PSI, four port 1/4inch connector. With an Unloader. Easy to install and convenient to use. Notice: your electric motors amp rating is less than the Max amp current of the pressure switch. Color: Black Material: metal Pressure: 140-175PSI Max pressure: 175 PSI Min on: 50 PSI Differential: 30-40 PSI Port: 4 ports 1/4inch (Female NPT) Pole: 2 Pole Rating AMP Rating: 26 APMS Single Phase or Three Phase, 110/230/460 Package Includes: 5 x Pressure Switch Control Air Compressor 140-175 PAI Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.