Interstate Pneumatics W1285A is a ¾” heavy duty metal bowl 16 oz. high flow lubricator. This air lubricator provides automatic line lubrication to extend air tool life. This lubricator injects air tool oil in the line to lubricate your air tools and keep them running smoothly. The adjustment knob on top regulates the amount of oil distributed. It can be combined with other air source treatment products. It is recommended to always install in a line used for air tools only since oil will contaminate paint guns.