Interstate Pneumatics W1260A is a ⅜” large metal bowl lubricator that provides automatic line lubrication to extend air tool life. The lubricator injects air tool oil in line to lubricate your air tools and keep them running smoothly. The adjustment knob on top regulates amount of oil distributed. We recommend to always install in a line used for air tools only as oil will contaminate paint guns. It can be combined with other air source treatment products.