Product performance characteristics: 1. adjustable oil discharge volume, easy to adjust. 2. with a one-way valve to prevent the drainage of the oil agent backflow. 3. easy to install, easy to use. 4. energy saving, environmental protection. 5. using oil agent viscosity: 30#-60# oil.6. The filter should be cleaned once every six months when not in use.Caution: When operating, intelligently press the handle once and wait until the oil supply is complete (the handle automatically recovers) before proceeding to the next one.