Aquatic Air Pump-Double FEATURE: High polymer composite rubber air pump for long working life and reliability. Low noise , generous air capacity, dose not require oil lubrication. Electronic control of input ratio for high efficiency and low energy consumption. Reliable function. Aquatic Air Pump-Double FEATURE: High polymer composite rubber air pump for long working life and reliability. Low noise , generous air capacity, dose not require oil lubrication. Electronic control of input ratio for high efficiency and low energy consumption. Reliable function.