Rainbird RD1800 Series Pop-Up Non-Portable Spray Head without Nozzle, 4" 4 in. pop-up spray head Designed for use with all Rain Bird plastic spray head nozzles - Rotary Nozzles, U-Series, MPR, HE-VAN, VAN, and SQ Series Constructed of time-proven UV-resistant plastic and corrosion resistant stainless steel parts, assuring long product life Purple ring indicates non-potable application Nozzle not included