Hubbell Wiring Device-Kellems floor boxes sink into the floor of a room or an office enclosing, wire connections in provided multiple sockets. They feature steel construction with black or aluminium finish covers for reducing oxidation on exposed surfaces and offer 1 or 2 gangs, ensuring clean & combined electrical components, fixed in the box, as well as enabling easy electrical access. The floor boxes also include round shaped, fire-rated, poke throughs that expand during a fire, creating a fire seal & preventing heat transfer and are ideal for retrofit & new construction, accepting all brand's cover flanges & subplates. The Flush rectangular floor boxis adjustable for levelling & height and has concrete knockouts, allowing multiple conduit sizes. Choose from a wide range of these floor boxes, available in hole diameter of 4 inch.