Killark GRBB - Compact rectangular enclosures with threaded screw covers provide easy access to interior. High strength, lighter weight, corrosion resistant copper free cast aluminum construction. Available with a flat blank or dome covers. Cover o-ring, Nitrile (BUNA-N) material, supplied standard supplied standard for a Type 4X rating. Cast mounting lugs are standard on all boxes. Internal ground screw supplied on all boxes. Electrostatically applied gray powder epoxy/polyester finish on exterior of box and cover. Mounting pans are available. Conduit and device openings factory or field installed. Compact square or rectangular enclosures. Can be shipped in component parts and still maintain third party UL-CSA-FM approvals. Cast mounting lugs are standard on all assemblies. Available as blank box or can be custom drilled and tapped for conduit openi