REG0250M Air Compressor Regulator ROLAIR 1/4" 4 Port Regulator **OEM** 1/4" Air Regulator Replaces: D27253 Fit Many Dewalt, B&D Craftsman & Porter Cable. Fits Too Many Models to List. If you are unsure, please send us your model and type number In-Line or Modular Installation Full Flow Gage Ports AIR FLOWS IN ONLY ONE DIRECTION THROUGH THE REGULATOR. THIS DIRECTION IS INDICATED BY THE ARROW