About Weber Grills Weber-Stephen Products Co., headquartered in Palatine, Ill., is the premier manufacturer of charcoal and gas grills, grilling accessories, and other outdoor room products. A family-owned business for more than 50 years, Weber has grown to be a leading seller of outdoor grills worldwide. * Replacement cooking grates for Weber Genesis 300 * Porcelain-enameled cast iron grates * Set of 2