3/4" NPT, INDUSTRIAL GRADE HEAVY DUTY LUBRICATOR / OILER FOR PNEUMATIC AIR TOOLS ON COMPRESSED AIR LINES. 140 CFM FLOW RATE, 5oz METAL BOWL WILL HOLD 5 FLUID OUNCES OF AIR TOOL LUBRICANT. PLEASE NOTE::: 3/4" NPT MEASURES 1.05" OUTSIDE THREAD DIAMETER IN INCHES. 250 MAX INPUT PRESSURE, 225 MAX OUTPUT PRESSURE. BOWL HAS VISIBLE SIGHT GLASS TO VIEW OIL LEVELS AT A GLANCE. THIS UNIT INCLUDES WALL MOUNTING BRACKET FOR EASY INSTALLATION. RECOMMENDED LUBRICANT IS ISO-VG32 OR ANY LUBRICANT THAT IS SPECIFIC TO PNEUMATIC AIR TOOLS. YOU CAN CONTROL THE AMOUNT OF OIL FLOW BY ADJUSTING THE ADJUSTMENT SCREW ON TOP OF THE LUBRICATOR. OPERATING AND INSTALLATION INSTRUCTIONS INCLUDED. ALMOST ALL PNEUMATIC TOOLS PERFORM BETTER WHEN LUBRICATED WITH OIL. INJECTING AN OIL MIST INTO THE AIR-STREAM WHICH POWERS THEM CAN CONTINUOUSLY LUBRICATE VALVES, CYLINDERS, AND AIR MOTORS FOR PROPER OPERATION AND LONG SERVICE LIFE.