For transferring from one container to another or draining oils and other fluids. Hand-operated, self-priming. For farm, home, automotive and factory use. Heavy-duty steel construction with durable FKM O-ring. 8 ft vinyl hose (1/2 in ID x 0.63 in OD) to handle up to 90 weight fluids. Features a double check valve. 1 gal/8 strokes.