depict:
1) decent outer and install easy
2) it common using
3) cracking difficult

depict:

1 decent outer and install easy:concerned  for convenient

2 it common using:it made from PVC material could insulated and nest the wall vertical.

3 as well as protective system of the low-tension wiring.

4)non-toxic, chemistry bear , no any effect of epiphyte and germ.

5) it can resisted  termite, bear airslake.