• Enlarged 45mm oil filler hole for easier to refill oil.           
• With oil dispensing gun to easily control the oil filling rate.           
• With a  dehumidify valve to filter the water from the air compressor.           
• Compressed air could be stored in the tank and use for filling oil at any place.           
• A clock or digital meter can be attached to measure the volume of the refilled oil.(optional part)           
• Capacity: 25L