Model:  RL-SR31B
Size：  31mm
Spring Size:
A 100 x 1800 B 110 x 1800
C 110 x 2600 D 120 x 3200
E 120 x 4000 F 130 x 4000
G 140 x 4000 H 150 x 5000

Product Description.
1. Designed for the heavy curtain cloth, with the good spring and advanced position system, oil retarder and the regulator, performance-to-price ratio most superior.
2. The elasticity of the spring can be adjusted as you like.
3. Matching the slowdown device, it abate the wallop efficiently which made by rebound of the spring.
4. Easy operation, short time work, no noise, the blind will rise up to the top smoothly.
5. The blind can be stopped at any position you like.
6. Parameter:
a. Max bearing weight：2.8Kg；
b. Width：400 mm-3000 mm;
c. Max height：4000 mm；
7. With 32mm special aluminum tube.
8. Available for office, store, hotel, house, school and so on.

Product Description.
1. Designed for the heavy curtain cloth, with the good spring and advanced position system, oil retarder and the regulator, performance-to-price ratio most superior.
2. The elasticity of the spring can be adjusted as you like.
3. Matching the slowdown device, it abate the wallop efficiently which made by rebound of the spring.
4. Easy operation, short time work, no noise, the blind will rise up to the top smoothly.
5. The blind can be stopped at any position you like.
6. Parameter:
a. Max bearing weight：2.8Kg；
b. Width：400 mm-3000 mm;
c. Max height：4000 mm；
7. With 32mm special aluminum tube.
8. Available for office, store, hotel, house, school and so on.