Conduit Combination Coupling; Installation EMT to Rigid/IMC; Trade Size 1 Inch; Constructional Feature Raintight; Material Ball Burnished High Strength Zinc Alloy; Size 1.63 Inch Dia x 1.88 Inch L; Standard Package 50; Approval UL 514B, ETL (Canada and US), CAN/CSA C22.2; Used On Rigid/EMT Conduit; ROHS/TCLP Compliant; Applicable Standard Federal Specification A-A-50553A, NEMA FB-1