Convenience: Very suitable for recreational vehicles, such as caravans, caravans, RVs, boats, work cars, mobile toilets, outdoor areas and barbecues Double-acting operation delivers water from top to bottom. Self-priming, easy to get water anytime and anywhere. Rugged and durable metal structure. Material: metal, mounting hole: 32 mm, tube length: 180 mm, including: 1 hand pump for caravan sink Product Function: Easy to use, manual water absorption The suction pump should pump up and down with your hands. This can help you exercise without consuming too much power. For many outdoor travel enthusiasts, it will be the most convenient pump. Its compact and practical design is deeply loved by many outdoor enthusiasts. When you need to extract 400ml of water, just press the pump 6-7 times to complete. It is a very effective life assistant. Specification: Material: Metal White Mounting hole diameter: 32mm Tube length: 180mm Understand: 1 x Hand pump for caravan sink