RYOBI D3550 Fire-Resistant Door Return Spring Mechanism (No. 2–No. 3–No. 4–No. 5–No. 6)
Branded Japanese Ryobi fire-rated door return spring mechanism of top construction quality and performance.
RYOBI D3550 Fire-Protection Door Return Spring Mechanism (No. 2–No. 3–No. 4–No. 5–No. 6)
Branded Japanese fire-resistant Ryobi door return spring mechanism of top construction quality and performance.
This specific mechanism features a special concealed track-rail arm.
Suitable for aluminum, stainless steel, wooden, and steel doors, with a door leaf width ranging from 90cm to 155cm.