Operates mechanically by means of a spring.
Can be filled manually hydraulic grease nipple using a grease gun.
Transparent, thick-walled and unbreakable plastic reservoir.
2 positions: open or closed.
Equipped with safety valve, can be installed in any position.
Environmentally friendly and cheap.
Lubricating grease of your choice.

material: brass with plastic cup and galvanized spring
capacity: approx. 55 ml
connection: 1/4" external thread