These shelf supports are connection accessories commonly used by furniture partition fixing, which are made of Pp and iron material, not easy to break and wear, can be used for a long time. Easy to install with drill (not included), create more space of wall for storage or display in any room. Features -Color:Light Brown -Material:PP, iron -Size:22.00X1.40X1.40cm,21.50X1.20X1.20cm,19.00X1.00X1.00cm,17.20X1.00X1.00cm/8.65X0.55X0.55in,8.45X0.47X0.47in,7.47X0.39X0.39in,6.76X0.39X0.39in -With iron and pp plastic, floating shelf bracket allows shelves to be sturdy and stable on the wall, won’t bend or break . -Easy to operate and install, sturdy and strong, not easy to rust, break and wear. -Easy for installation: drill a hole in bracket and drill a hole on wall, mount the bracket to the wall. -It is very convenient and you can change the partition of the closet or shelves at any time. -The brackets will hide inside the shelf, and your shelf will be floating, creating a beautiful and elegant modern look to your home. Package list: 4 x hidden shelf brackets (4 sizes) 4 x expansion tubes 4 x screw gaskets 4 x washers