Pressure regulator maintains proper cooking temperature automatically. Cover lock indicator shows when there is pressure inside. Durable, polished aluminum for easy cleaning, long life, and quick, even heating. Includes ergonomic handles, cooking rack andinstruction/recipe book. UL Listed. Replacement parts including Orgill Nos.680.3282 Sealing Ring, 699.2028 Over Pressure Plug, and 625.5236 Pressure Regulator sold separately.