Features:This is a small piston structure (tank volume: 0.6L) manual pump.Working principle: When the handle is pressed by hand, the piston moves up and down under the action of a lever, which is a process of oil absorption; when the handle is loosened, the piston moves downward under the action of the spring force, and is an oil discharging process. The pump can be combined with a throttling distributor to form a centralized lubrication system. It is suggested that the oil viscosity is N20-N500.Left hand operated method, 4mm oil outlet diameter.Widely used in lubrication system of CNC machine tools, machining center, production line, forging, textile, plastic, wood, rubber, mining, metallurgy, construction, printing, casting, auto, food and other mechanical equipment.Specifications:Model: HP-5LDrive mode: Left hand operatedSpit: 5ml/minMaximum discharge pressure: 5kgf/cmCapacity: 650ccOutlet diameter: M8*1(4mm)Weight: Approx. 541g / 19.1ozPackage List:1 * Manual Lubricating PumpNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..