Cast aluminum, cast iron and brass. 5.5 x 8.15 x 3.5" Ready to race speedily across your tabletop or bookshelf, the iconic form of American transportation and wanderlust displays your book collection securely between two spoked wheels. Cast in solid aluminum and brass and fitted to substantial iron bases, our Motorcycle Bookends are available in either brightly polished aluminum or matte black paint finish, both with brass highlights. Felt surfaces protect your furniture.