http://www.shanghaiyunyue.com/laboratory-equipment/ Introduction The electric heating sleeve is an electric heating jacket which realizes constant temperature heating by electronic voltage regulation. It adopts alkali-free glass fiber as insulation material, Cr 20 Ni 80 alloy wire spring is installed inside, aluminum silicate cotton vacuum forming hemispherical insulator is used to keep warm, the shell is injection molded once, and the upper cover is electrostatic spraying technology. Due to the spherical heating, the heated area of the container can reach over 60%. Company CertificateChina Laboratory Equipment suppliers website:http://www.shanghaiyunyue.com/laboratory-equipment/