Gramercy bench frames are made of durable cast aluminum, and come with a wide variety of seating materials. The Gramercy bench s seating materials feature 5/8 Diameter Steel Rod or x 1 Steel Bar or 1 x 2 1/2 and 1 x 3 Board Profiles. The frame is constructed of 3 Wide Cast Aluminum. The benches are available in lengths of 4, 5, 6, and 8 feet.