DON series HOT AIR OVEN Automatic HOT Air Ovens with Digital Temp. Controller and Digital Timer. Operating Temp. : 40~250℃ (DON-450/650) DON-450 : 93liter. DON-650 : 152liter. DON-600M : 150liter. DON-800M : 240liter. DON-1000M : 420liter. DON-1200M : 756liter