Adopts a sturdy fully welded double-wall structure and double-layer 1.2mm-thick high-quality galvanized steel sheet to form a 38mm gas-proof insulator space, which is safer for fire protection and has a longer service life.  Environmentally friendly electrostatic coating, which is bright and clean and corrosion-resistant. Fire-proof and explosion-proof  vent design can effectively reduce the concentration of volatile substances and prevent fire hazards. Pass the authoritative FM  certification.