Features: 1. This unit enjoys compact structure and small size. It is suitable for increasingly mini host-machine matching requirement, easy installation. 2. Filter combined with semi-auto drain set, it will be automatically drained when host-machine shot down compressed air. It is also possible for manual drainage. 3. Regulator adjusting is both sensitive and dependable. 4. Lubricator opening adjustable, suitable for different lubrication requirement. 5. It can be used combined or individually, easy loaded or unloaded. 6. Mult types available and can satisfy different customer requirements.