Flexible Nozzle: The pool nozzle can be adjusted and locked in place with an external locking ring, which has a 3/4" opening and a 3/4" thread to fit a plastic hose. 3/4" PVC. Excellent Features: The spa massage nozzle will provide the correct circulation pattern while controlling speed and flow. Directional water flow inlets are fully adjustable. Durable Material: The pool eyeball nozzle is durable with excellent PVC material.This pool nozzle is well made, safe and corrosion resistant. Stable Features: The swimming pool massager eyeball nozzle has stable features.Directional water flow inlet connection that allows speed and flow control. Pool eyeball nozzle is convenient for swimming pools and other large-scale water storage equipment.A beautiful a Alternative to the pool outlet nozzle. These directional water inlets are fully adjustable and flow straight into most areas of the pool, providing the correct circulation pattern while controlling speed and flow. Packing list: Nozzle*2