Feature: 1. DC permanent magnet motor is used to make the piston reciprocate in the cylinder to produce a large displacement and high pressure airflow. 2. Selected high‑quality aluminum alloy materials, phosphate surface treatment, fast heat dissipation, corrosion resistance, and good adhesion. 3. Oxygen pump, the oil‑free lubrication design, which can produce purer compressed air, and the oxygen increase effect is continuous and stable. 4. Easy to use and install, pure air can be discharged as long as the corresponding battery is connected, and the working stability is strong. 5. Can provide uninterrupted bubbles and high‑quality oxygen supply, widely used in aquariums, fish tanks, pond, pool, aquaculture, etc. Specification: Item Type: Oxygen Pump Material: Aluminum Alloy Weight: Approx. 1190g / 42oz Product Size: Approx. 14.5x10x7.3cm / 5.7x3.9x2.9in Power: 18W Voltage: DC 12V Pressure: 0.06MPa Exhaust Volume: 38L/Min Uses: Suitable for aquaculture, fish tanks, aquariums. Package List: 1 x DC Oxygen Pump1 x Splitter1 x Connecting Tube1 x Manual1 x Connecting Wire1 x Copper Nozzle Note: 1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. This is a direct current pump, which is in contact with direct current. The pump is not submersible, please do not put it in the aquarium and keep it dry.