The AccuTemp 1.9 cu ft vacuum oven comes standard with the secondary over-temp protection dial, all stainless steel tubing/compression fittings, stainless steel vacuum/vent valve, oil-filled vacuum gauge, 5 sided pad heating technology and two year warranty. The thermal-conductive aluminum shelves provide excellent temperature uniformity inside the chamber, while our 3rd gen LCD low proportional gain temperature controllers keep your oven temperature within ±1°F accuracy, in either °F or °C.