Features: 1Widely applied to colleges, petrochemical industries, medicine, and environment protection institutions for liquid heating. 2It uses high?temperature alkali?free glass fiber as an insulating material, seals the resistance wire in the insulating layer. 3The product has the advantages of large heating area, fast heating, good heat preservation effect, unclear flame, and not easy to touch glass ware. 4Using advanced non?electronic electronic voltage regulating circuit, compared with mechanical temperature regulation, it has a long service life and a large temperature regulation range. 5The electric heating mantle has the function of voltage stabilization, which is the most ideal heating equipment for laboratories and fine chemical devices. Package included: 1 x Heating Mantle 1 x Instruction Manual