The half round gutter angle in 90 degrees is pressed in one piece, not welded which eliminates the risk for leakage.
This product is made of precoated galvanized steel in 0,6mm thickness (except for Magestic, which is a non coated material). Because of the high quality steel, coated or non coated, it will age in the same way as all the other products in the system and no difference in design will occur.