Description This item is a 1/4 inch mini oiler, which is made of brass and plastic, it provides automatic lubrication of pneumatic air tools which prevents rust and corrosion and llows the tools to have a smoother more effective operation, which extends the tools life. Features - - Material: Brass, plastic. - Size: 1/4 inch. - Provides automatic lubrication of pneumatic air tools which prevents rust and corrosion. - Allows the tools to have a smoother more effective operation, which extends the tools life. - Lengthen your air tools lifetime and improve their oerformance.