IMC/Rigid Conduit Coupling; Type 3-Piece, Threaded; Trade Size 6 Inch; Diameter 7-7/8 Inch; Length 4-1/8 Inch; Material Zinc Electroplated Malleable Iron; Constructional Feature Concrete-Tight; Standard Package 1; Approval UL (Canada and US), CSA; Used On IMC/Rigid Conduit; ROHS Compatible; Applicable Standard Federal Specification A-A-50553