Aluminum housed heating mantle 1L round bottom flask to 400 degrees C maximum internal operating temperature.115V, 380W CSA. The Series TM mantle covers only the flask's bottom half, letting you see its full contents. Larger sizes have multiple circuits for ease of temperature control when a flask is less than half full. . All 115 volt units are CSA certified.Series TM mantles are available with a bottom hole for flask drains.