The Elemental Solutions O2 Commercial Pump's powerful electromagnetic motor pushes 1,157 gallons per hour to provide reliable output for air diffusion devices. It features high-quality aluminum alloy housing and a wear-resistant cylinder and piston. The 120-volt, 65-watt O2 Commercial Pump includes a six-outlet air divider and 3/8-inch-ID connection tubing. The air divider is compatible with 3/16-inch-ID tubing (available separately). The O2 Commercial Pump features a one-year warranty.