The height of this aluminum riser can be adjusted from 22 inches to 36 inches as plants and shrubs grow. The nozzle adjusts to spray in a part to full circle pattern, and includes a distance adjustment screw. An easy-to-clean filter helps prevent clogging. Pressure regulation keeps water from being lost to inefficiencies, so more water gets to your plants where you want it. A pre-installed pressure regulator delivers a constant 30 PSI - the precise pressure at which spray nozzles operate best. Delivers even, and consistent water coverage over a nozzle's radius. No overspray or misting due to an over-pressurized system.