Innovera Nonskid Heavy Gauge Steel Universal Economy Bookends, 4 3/4 x 5 1/4 x 5-Inches, Black, 6 Pair (54055) Go to amazon.com Related posts Top 15 recommendation book shelf dividers FeatureOfficeUniversalBookends DescriptionInnovera Universal Economy Bookends, Nonskid, 4 3/4 x 5 1/4 x 5 Inches, Heavy Gauge Steel, Black (54055) 6 Pack (12 Bookends)