Product Features:

Utilizing三元乙丙composite sealing strips, excellent sealing properties

Frame is hot-dip galvanized square tube

Fiberglass Reinforced Plastic (FRP) Panels: Corrosion-resistant, aging-resistant, acid and alkali-resistant

Centered is a 2-inch thick B2 flame-retardant foam board (polyurethane foam board), manually operated by a winch or motorized for automatic control.