Product Features:

Utilizing EPDM composite sealing strips, excellent sealing properties.

Frame made of hot-dipped galvanized square tube

Fiberglass Reinforced Panels: Corrosion-resistant, aging-resistant, acid and alkali-resistant

Centered is a 2-inch thick B2 flame-retardant foam board (polyurethane foam board), which can be manually winched by hand or automatically controlled by an electric motor.