Ideal for transfer from one container to another, also for draining oils and other fluids. Hand operated, self-priming. Great for farm, home, automotive and factory use. Heavy duty steel construction with durable VITON O-rings. 8 ft Vinyl hose (.50 in ID x .63 in OD) for suction and discharge of fluids up to 90 wt. Double check valve. Approximately 1 Gal per 8 strokes.