Interstate Pneumatics LF10-4H-HP Pressure Switch - 1/4 inch FPT Four Port - Bend Lever Swicth 135-175 PSI fits Dewalt Hitachi Emglo Makita Porter Cable Ridgid Rolair air compressors 1/4 inch NPT Female connection 6.3 mm unloader valve connection Cut off pressure 135-175 PSI Amperage Rating 20 Amperage Bend lever switch