This extractor is designed to vacuum fluids from inaccessible or confined areas. It is ideal for oil changes on boats, cars, motorcycles, outdoor power equipment and industrial machinery etc, allowing for the oil to be cleanly extracted though oil filler or dipstick holes when it is not possible or practical to use the drain/sump plug. Designed to extract fluids from inaccessible or confined areas.Capacity: 6 litre. Great for oil changes on vehicles, mowers, generators & industrial machinery. Also suitable for removing bilge water from the bottom of boats or trapped water in plumbing systems.