We sell 3x4 Downspout for areas with more rainfall. If your store deos not stock then you can special order as an option. Or you can add an additional outlet and put in another downspout.
The paint coating would serve as a primer. You would need to scuff the finish for other paint to stick.
It is 10" long.
4" and fits well in the standard drain pipe
standard house gutter
I believe the American Aluminum Gutter Hangers #83709 would be best because they attach to the roofing not the fascia. Or Amerimax Steel Gutter Screw and Ferrule #122295, which has self-tapping screws.
The cap has to be purchased separately, but fits well
No. White and brown only.