Killark UNF400 - Unique design offers a compact size for lighter weight and smaller profile for critical clearances with equipment - Extruded bar stock construction provides superior threads over sand cast and provides twice the tensile strength - Uniform design across all sizes for aesthetic and robust appeal - Male to Female union has nonremovable nipple to ensure tight seal with union and pipe/equipment - Made in the USA Unions are used to connect two pieces of conduit or attach conduit to junction boxes, fittings, or devices. Permits removal of equipment without turning or removal of conduit