Abstract: Covers for a container including an interior area are provided. The covers include a shaped surface for facing away from an interior area of a container. Example covers can include a substantially planar surface, a substantially concave surface, and a smooth transition from the substantially planar surface to the substantially concave surface. Further examples of covers can include a first substantially convex surface, a second substantially convex surface, and a substantially concave surface. Still further examples of covers can include a second surface for facing towards an interior area of the container wherein the second surface includes a transition that substantially follows a transition of the shaped surface.

Abstract: A housing for receiving electrical wire from a conduit includes an interior area and at least one coupling including an internal passage configured for communicating with the interior area. The coupling includes a plurality of attachment areas that have successively different sizes along the internal passage for attaching to different sized conduits.