These are cast aluminum but are darkened and hand hammered to make an authentic look. Original old new stock. Four are double arm, two are single. Price is for the entire set and includes wiring. Please specify if you would like wiring. The dimensions are: Double arm 11.25 in. H x 5.25 in. L x 9.5 in. W, single arm 11.25 in. H x 5.25 in. L x 4.125 in. W.