This product is a set of four natural gas supply tubes designed for use with Jenn-Air cooktops, specifically the model JGC8430BDB and many others. These aluminum tubes are compatible with Maytag and Whirlpool brands, making them versatile for various cooking appliance needs. The set includes everything needed for installation, allowing for convenient replacement or upgrade of existing gas supply tubes in your cooktop. With a unit quantity of four, this set is suitable for ensuring a reliable and efficient gas supply for your cooking appliance. This set includes (4) Natural gas supply tubes. Valves sold separately, check my listings for more parts that fit this cooktop! Ships fast! 💨 Thanks for looking! 👀-Dutch T