Economy Heating Mantle 100 Ml. Economy heating mantles suitable for distillation, evaporation, extraction and boiling experiments using round bottom flasks. The units have electronic temperature regulation, outer casing manufactured from furnace-painted steel and come complete with retort rod fixing. • Electronic temperature regulation • Variable temperature control • Inner vessel thermally isolated • Chromium-nickel heating elements • Power off/on and heating-up lamps • Includes fixing for retort rod