Rain Bird SP40-AP Pop-Up Spray Head, 4 inches Patented pop-up mechanism retracts into lawn when not in use Made from plastic; easy-to-remove filter screen; patented stem cleaner Adjustable spray pattern; covers any part of a circle from 0 to 360-degree Easy-to-set; no tools needed; distributes water evenly Measures 6 inches long overall; 4 inches pop-up ideal for ground cover or taller grasses