These Orbit Saturn III nozzles are gear driven and work with any Saturn III gear drive head. These spray nozzles are water-conserving and are extremely easy to install. Conveniently, these Orbit sprinkler nozzles come in a pack of 4. They work just as the original Saturn III nozzle with flow adjustment. The Orbit Saturn III nozzles are an excellent value. Features and Benefits: Come in a pack of 4, Work with any Orbit Saturn III Orbit Titan, Orbit Eclipse or Orbit Neptune gear drive sprinkler heads, Allow for water efficiency and conservation, Easily adjust water flow.