Heating Mantle with built-in energy regulator, all mantles are individually constructed and factory inspected to the highest electrical standard. With models as following: – AV-HM-01, Cap. 100 ml – AV-HM-02, Cap. 250 ml – AV-HM-03, Cap. 500 ml – AV-HM-04, Cap. 1000 ml – AV-HM-05, Cap. 2000 ml – AV-HM-06, Cap. 3000 ml – AV-HM-07, Cap. 5000 ml – AV-HM-08, Cap. 10000 ml – AV-HM-09, Cap. 20000 ml