This product is a Factory Certified Accessory. These three words represent quality parts and accessories designed specifically for your appliance. Time tested engineering that meets our strict quality specifications, Package contains (1) High Altitude Range Conversion Kit, Natural Gas, Tools Needed: Multi screwdriver, adjustable wrench, 7.0 mm nut driver, 7.0 mm wrench, 30-Day Return Policy, Package contains (1) Natural Gas Range High Altitude Conversion Kit