Kejia muffle furnace uses double carbon steel layer shell and 30 segement PID control. The furnace consists of high purity alumina polycrystalline fiber brick and high quality heating element. This furnace equips with air cooling system, which makes temperature cool and rise quickly. It is an ideal tool for materials annealing and sintering , composition analysis, quality testing, ashing in colleage lab, research institutes, etc..Ask muffle furnace price throw the email to have your needs.