How it works: When pulling the handle by hand, push the plunger to drain the oil that be stored in the cylinder. When the handle is released, the plunger sucks oil under the action of spring force. Scope: The pump can be combined with a throttling distributor to form a lubrication system. It is recommended to use oil viscosity N20-N1000. Products are widely used in CNC machinery, milling machine, lathe machining center, production line and machine tools, forging textile, plastics, rubber, mining, metallurgy, construction, printing, chemical, pharmaceutical, casting, food and other industries machinery and equipment Lubrication System. Products use high-quality seals, not easy to leak. Handle bit with special materials, easy to break., Weight: 4.05209637556 pounds, Manufacturer: Ynusgeyx