Jones Stephens has built its reputation over the years as a leader in the plumbing industry, providing the market with thousands of products to complete any project. This Water Meter Valve Box Extension features black plastic construction. Manufactured of corrosion resistant materials, all parts are designed with quality engineering and construction to be durable and reliable and to meet Jones Stephens highest quality standards. The 6 in. extension fits 15 in. jumbo rectangular water meter boxes (Jones Stephens model M15001). Note: for non-vehicular applications. Concrete and asphalt installations are not recommended for plastic parts. Available in a variety of sizes, shapes and materials.