Coilhose® Compressed Air Lubricator, Heavy Duty, series: Series 88, 3/4 in NPT Port, 150 psi Pressure, Polycarbonate Bowl, Die-Cast Aluminum. The proven, timeless design of the Heavy duty 88 series will ensure a long, trouble free service life. Heavy duty series lubricators provide a method of lubricating the entire compressed air system, eliminating the need to add oil to each tool individually. The tamperproof cap allows the oil delivery rate to be locked in For added convenience, additional oil can be added without requiring depressurization. Coilhose® 8846 Series 88 Heavy Duty Compressed Air Lubricator with Bowl Guard, 3/4 in NPT Port, 150 psi Pressure