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