Matala Hakko Series Air Pumps are sleek in design. It is a small unit with surprisingly high output. The Hakko air pumps are built to last with a very durable body and mechanics meaning years and years of everlasting quality airflow. Hakko air pumps utilize linear- motor theorem to reduce power consumption during full operation. Units are extremely quite utilizing spectrum analysis technology in order to decrease any mechanical noise. No oil needed for lubrication making the Hakko easy to maintain. Adding an air pump to your pond system will help increase levels of healthy bacteria, lower algae levels, and help create and maintain a healthy eco-system. Air pumps are recommended for all pond sizes. Matala Hakko Series Air Pumps ALONE do not come with a manifold, but one can be purchased separately, or if you buy a kit as listed below they come with it. The outlet is 5/8″, but if you purchase the manifold (or buy the kit), the outlets are 3/16″ (Standard airline tubing).