1). Side track and side seal:
The side track fixed the vertical track, finger protection. The side seal avoid the wind the sand get into the inside room.
2). Aluminum bottom rail and seal:
The aluminum rail looks nice when put on the door panel, and the seal avoid the wind and sand get into the inside room.
3). Torsion spring: spring is balance system; make the door easy to lift
① spring
② galvanized spring
4). Anti-break system(security system):
①spring anti break:
② cable anti break:
5). Window for choose:

Downloadsectional door accessories.rar

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