Product Features:

Utilizes三元乙丙复合胶条 for excellent sealing properties.

Frame made of hot-dip galvanized square tube

Fiberglass reinforced plastic panels: Corrosion-resistant, aging-resistant, acid and alkali-resistant

Centered is a 5 cm thick B2 flame-retardant foam board (polyurethane foam board), manually winch controlled/available for motorized automatic control.