Rain Bird CPVBSTDEXT Professional Series 6" Extension Rectangular Sprinkler Valve Box, Black with Green Lid, 6.75" High. Professional-grade 12” rectangular valve designed to extend the Rain Bird CPVBSTD valve box or as a deep standalone 6” box to protect up to 4 electric or manual valves from damage. Made in the U.S.A. to exacting Rain Bird standards; designed to provide rugged, no-nonsense dependability. Features a lightweight black body and overlapping drop-in dark green snap-lock tab lid which blends into grass and foliage. Textured, skid-resistant lid surface helps prevent accidental slips/falls. Pre-molded pipe slots provide quick and easy pipe placement. Support ridges offer exceptional sidewall support under heavy loads. Wide bottom flanges resist sinking in unstable ground. Body constructed of 100% recycled materials making it earth-friendly and LEED compliant. For use with multiple valves; comfortably fit up to 6 valves depending on valve design. Provides a tight seal and easy maintenance access. Dimensions: top opening 17” long x 11.75” wide, bottom opening 18.875" long x 13.625” wide, height 6.75". Rain Bird “The Intelligent Use of Water”