... irrigationPSJPYXK 10 Metallic skin zinc alloy rocker arm pop-up sprinkler with adjustable spray angle Application:Apply for grassland, airport, stadium, ... tour, sports, or pollard.Open valve when start irrigating, sprinkler will stretch out from ground automatically at high water pressure ... by itself.Cast iron skin, zinc alloy rocker arm sprinkler inside. High strength of spray, head of rocker arm ...