Galvanized steel is a popular choice for gutters. It's a very durable and strong material. The gutters come in 20' lengths and are unpainted.
The Fascia Gutter is popular for modern houses as it's face is completely flat, complementing the house. We install it unpainted but can easily be painted to match your house.
The galvanized steel downspouts come in a few size options, the most used being 1.75" x 2.75" or 2" x 3". They have a flat surface and come unpainted.
The galvanized steel downspouts also come in 2" and 3" round sizes.