3/8" MID FLOW LUBRICATOR / OILER FOR PNEUMATIC AIR TOOLS ON COMPRESSED AIR LINES. 88 CFM FLOW RATE, 5oz POLYCARBONATE BOWL WILL HOLD 5 FLUID OUNCES OF AIR TOOL LUBRICANT. PLEASE NOTE::: 3/8" NPT MEASURES 0.675" OUTSIDE THREAD DIAMETER IN INCHES. 215 MAX INPUT PRESSURE, 145 MAX OUTPUT PRESSURE. POLY BOWL IS VISIBLE THROUGH METAL BOWL GUARD TO VIEW OIL LEVELS AT A GLANCE. 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.