Protect components in shallow installations with the tapered 14 X 19 in. Rectangular Standard Series Valve Box Extension and Cover. The riser and lid can also be stacked onto a traditional valve box to add 2-1/4 in. of height, and the sloping design prevents shifting or tilting for a secure enclosure. The black box comes with a purple overlapping cover to prevent dirt and debris from entering and is marked "RECLAIMED WATER" for content identification. The edge of the cover also indicates where to lift. The valve box tapered extension is made of polypropylene (PP) and the lid is made of high-density polyethylene (HDPE), both treated with UV inhibitors