We, RainTech Raingutters of Alaska, use the highest quality metals. Custom-Bilt Metals has been suppling our metal for the past 25 years. They have a life time warranty on the baked on acrylic finish, see the warranty brochure for details.
Gutters are available in four possible metal types and 32 possible colors. Below is a chart providing samples of each color available for the gutters that we use and their corresponding metal types.
Continuous aluminum raingutters formed at the job site using .027ga (thickness) aluminum.
Pictured below is a diagram depicting both 5" and 6" K-style raingutters.