Warming Trends FK1 Single Flex Line & Key Valve Kit features a collection of necessary components to complete your gas fire pit installation. This kit includes (1) 1/2-inch by 2-inch nipple to connect a 1/2-inch plate coupling to an inside threaded 2/3-inch flex line flare connector and is designed for use with any burner over 249,000 BTU. This kit also includes a 3/4-inch key valve, a 4-inch key, and a 12-inch key. Be sure to follow the manufacturer's listed instructions and all local building codes when installing this product.