PC H or U profiles is widely used in installation.  H profile is used in connection so that the sheets are connected better and U profile is for waterproof. It is designed for 6m long. Any length can be ordermade.  The sheet can be 4mm-12mm thickness.

This accessory is 

1.made of polycarboante resin
2.waterproof design
3.trong structure
4.long durance