This marine water diaphragm hand-priming pumps is mainly crafted from ABS , with a sturdy and wear resistant structure , resistance , and designed specifically for marine applications When your electronic oil pumps malfunctions , it can be used as a backup oil pumps The manual bilge pumps have a fixed handle with a rubber handle , which is nonslip and wear resistant This manual hand-priming pumps have a maximums suction capacity of approximately 10 feet , a capacity of 720GPH , a flows rate of up to 12 gallons per minutes ( 45 liters per minutes ) , and a maximums discharge head of 3.5 feet , not need for complex tools , saving time and effort, Manufacturer: BULAIDAI