Quality, the most! Most of our productions have been exported to North America, England,etc.and got good report from our ... profiles for different purposes, such as for windows & doors, for solar panel, for decoration, etc.Surface treatment: Anodized/anodizing or power sprayed ... size :(1) 30*25mm suitable for solar modules of 30-120w(2) 50*35mm suitable for solar modules of 160-220w(3) 35 ...