Widely used to provide oxygen in aquariums, fish farms and hydroponic systems. Includes chrome air manifold, ranging from six to twelve outlets. Cylinders and pistons are made of premium materials, making the pump strong and durable. Convenient to operate without oil or much noise. All pumps now includes two different fittings. 793GPH and 1030GPH models comes with 1/4 in and 3/8 in fittings. 1300GPH and 3566GPH models comes with 1/2 in and 3/8 in fittings.