Metal-housed heating mantle are suited for laboratory settings including research and development laboratories that employ round-bottom flasks for heating liquids. Model HM is made to fit precisely around boiling and distillation-style round-bottom flasks to provide consistent, easy-to-control heat. The metal-housed heating mantles fit flasks with capacities between 50 and 6,000 ml and provide high temperature capabilities up to 842°F (450°C). They are offered in tabletop designs and are available with built-in controllers. The plastic-coated, chemically resistant metal housing is thermally insulated for safe touch.