Pearl Mantels 495-60 is a versatile shelf that can be installed in three different ways: alone, with corbels, or with corbels and an arch. The shelf has pre-threaded inserts for easy attachment of the corbels and arch, and comes with a hanger board for mounting it on the wall. The hanger board can be adjusted to fit different wall heights, and the shelf can be leveled using shims if necessary. The shelf is made of wood and MDF, and should be lightly sanded and wiped clean before painting or staining. A primer is recommended before applying a top coat.