A tamperproof cap allows oil delivery rate to be locked in and once oil delivery is set proportional oil-to-air delivery assures constant even lubrication, Bowl guard, Capacity Vol: 4 oz, Bowl Material: Polycarbonate, Inlet Size: 3/8"" (NPT), Operating Pressure: 150, 0 psi [Max], Height: 7"", Diameter: 3"", Body Material: Die Cast Aluminum, Type: Lubricator, SKU: ORSNO43056