Each item set has a spring-loaded pop-up sprinkler head with quarter spray pattern nozzle, standard plastic cap. Sold as 32 sprinklers each. Durable construction, offers convenience, ease and value. This medium area sprinkler head includes a plastic nozzle with an adjustment screw for easy flow and radius adjustment. A drop-in filter helps prevent a plugged nozzle. A stainless steel retraction spring and a wiper seal to keep out sand and grit.