engine oil extractor and oil pump/engine accessory/marine hardware/boat equipment Hose SizesBlack Extraction TubesSmall Tube:Outer Dia.-0.25 (1/4)"/Length-4'Large Tube:Outer Dia.-0.34 (11/32)"/Length - 4'Clear Drain TubeInner Diameter - 0.50 (1/2)" / Length - 8' · Self-priming - about 15 strokes creates a vacuum while the container holds the fluid· Ideal for most all forms of fluid extraction ( ...