Product performance characteristics: 1. adjustable oil discharge volume, easy toadjust. 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 everysix months when not in use.Caution: When operating, intelligently press thehandle once and wait until the oil supply is complete (the handle automaticallyrecovers) before proceeding to the next one.