Product description Vacuum drying ovens have a chamber volume of between 8 and 430 litres and a temperature range starting at between +10°C above room temperature up to +250°C. The interiors are made of corrosion-free stainless steel 304. https://www.sedmachinery.com/solid-preparation-equipment/vacuum-drying-machine/lab-vacuum-oven-drying-machine.html