PREMIUM MATERIAL:The case is made of high-quality ZL 102 aluminum alloy with radiation fins.heat-dissipation is more effective.Note: The aluminum manifold would get hot from high air pressure, it’s common that the air pump runs hot DRIVEN STRUCTURE: Driven by electromagnetic motor, adopts straight-line reciprocal motion to produce air and more reasonable in structure (Pressure>0.035Mpa;Output:110L/min;Max Flow: 1740 GPH) SUITABLE FOR USE:Adopts SF new-type wear-resistant material for the cylinder and piston,which is of low power consumption UNIQUE DESIGN :Oil-less lubricated design, the compressed air is purified.Ideal to provide oxygen in aquarium, fish farms and hydroponic systems with 12 outlets Made by integral moulding of thickened aluminum alloy for heat control.Adjustable distributor make separately control for air stone.Rubber base make the silencing section mere effective.Electromagnetic motor produces strong air pressure.Growers who use our Dual Diaphragm air pump can count on it to reliably oxygenate their reservoir with air stones. OPERATION Directions Connect the main outlet nozzle (barbed fitting) directly to the pump and then to the manifold using the supplied tubing. The main outlet nozzle may be connected directly to the target system (hydroponics, aquarium, etc.), or you can use the manifold to divide the airflow among many systems. In either case, you must purchase the tubing to connect to that system separately. Included in the package:1 x Air Pump; 1 x Air Divider Manifold; 1 x Outlet Nozzle;1 x Pump-Manifold Connector Tube(ID:8mm); 1 x User Manual.