Polyolefin Pop Up Drainage Emitter, UV Inhibitor, 4-In. Center Drive

4″ Pop Up Center Drive, Polyolefin Pop Up Drainage Emitter With UV Inhibitor, It Fits 3″ & 4″ Hub Sewer & Drain Fittings, Pop Up Does Not Rise High Enough To Interfere With The Mower, & It Blends Into The Surrounding Landscape, Since The Emitter Is Closed During Dry Weather It Keeps Out Debris & Rodents.