Economical, tall and lightweight; use with steel shelvingPlastic book support is constructed of a single piece of high-impact styrene with a distinctive arch design, for shock-absorbing flexibility and strength. Features 5" tongue that slide under books for support.Urethane foam-lined base.Available in 6 colors: -01 black, -02 blue, -08 desert sand, -12 jade green, -15 orange, -18 red. Overall dimensions: 9H x 6 1/4"W Base of support: 6"L