1. Adding a piece of spring in 1.3*500mm basic on the simple Lamos to support the pull when lifting can enlarge the applicative size of the weightily textile.

2. Adjusting the turns of spring reasonably, then to use the re-bounce of spring to support the lifting of the shade can be easy for the user to pull.

3. Assembled with 38mm aluminum tube;

4. Maximum size: W4000mm*H7000-10000mm

Criterion collocate：

1. Left bracket: 1 piece

2. Right bracket: 1 piece

3. 1.3*500mm Gear with spring booster: 1 piece