A rack component having a component body with a front, back, top, base, width between the front and the back, and an aperture extending through the component body near the top, the top of the component body configured to be the negative of a cut-out on the base, such that the cut-out on the base of one component body can receive the configuration on the top of an adjacent component body below it. A rack system using a series of the rack components is also disclosed.