Material：

Galvanized steel Plate (g)

Stainless steel plate (s)

Size: Custom size According to customer requirements (WXH)

Characteristics：

Blade with aluminum plate 1.0mm, with a light quality characteristics.

The blade automatically raises when the wind is sent, and the blades are closed automatically when the wind stops.

Installed at fan outlet to prevent airflow backflow.

The blade is opened and closed separately.