These are double walled units with outer made of M.S sheet duly enamel painted and inner made up of heavy gauge S.S. sheet. Gap between the two walls is duly fitted with high grade glass wool to avoid thermal loss. Temperature range from 500C to 1500C is controlled by "EGO" /JUMO GERMAN hydraulic type thermostat with an accuracy of ± 10C It is capable of withstanding a high vacuum. Provided with vacuum gauge, see through transparent window of toughened glass and one shelf. To work on 220/230 volts A.C. supply.