2. Waterproof, moisture-proof, mothproof and anti-mildew.
3. High strength, low wear and tear, non-swelling, no deformation and not broken.
4. Shorten construction period and enhance labor efficiency due to it is the profiles with standard size that it only need some cropping and necessary appendix to finish the installation, need no further processing,
5. Long service lifetime about 25-30 years but it needs no special maintenance, which will save lots of unnecessary maintenance costs.