Umbra Conceal L-Shaped Floating Bookshelf Gravity-defying conceal "l" bookshelf by umbra uses hidden brackets to hold books on the sloped shelf Constructed of bent wood with steel brackets; black finish Secure a book onto each end using the hidden brackets; stack additional books against the end books Measures 17 by 7-1/4 by 5-inch; maximum weight 30-pound; mounting hardware included Design: miron lior