Pneumatic Plus SAU Series Piggyback Air Filter Regulator Lubricator offers complete airline solution for most effective air filtration, pressure control and air lubrication to keep your air tools working properly. Oil Injection on the Lubricator can be adjusted and completed turned off as necessary. SAU Series Modular Air Filter Regulator Lubricator is offered with Drain (Manual or Auto) and Bowl (Metal or Polycarbonate) Options to better suit your needs. Search for different bowl and drain options by typing SAU4010M in Amazon’s search box.