Feature: 1. Widely applied to colleges, petrochemical industries, medicine, and environment protection institutions for liquid heating. 2. It uses high‑temperature alkali‑free glass fiber as an insulating material, seals the resistance wire in the insulating layer. 3. The product has the advantages of large heating area, fast heating, good heat preservation effect, unclear flame, and not easy to touch glass ware. 4. Using advanced non‑electronic electronic voltage regulating circuit, compared with mechanical temperature regulation, it has a long service life and a large temperature regulation range. 5. The electric heating mantle has the function of voltage stabilization, which is the most ideal heating equipment for laboratories and fine chemical devices. Specification: Item Type: Heating Mantle Material: Cold Rolled Steel, Alkali-Free Glass Fiber Application: Electric heating jackets are mainly used for liquid heating in university laboratories, petrochemical, pharmaceutical, environmental protection and other industries Temperature Adjustment Range: Ambient Temperature ~ 350℃ (stepless temperature adjustment) Maximum Temperature: 380℃ Working Time: Continuous Size: Approx. 500ML: 200 x 165mm/7.9 x 6.5in, 1000ML: 260 x 200mm/10.2 x 7.9in. Package List: 1 x Heating Mantle1 x Instruction Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.