Rigid Conduit Reducer Coupling, Large End Trade Size 1-1/2 Inch, Small End Trade Size 1 Inch, Material Zinc Electroplated Malleable Iron, Size 2-1/2 Inch Dia x 2 Inch L, Enclosure Class I Div 1 2 Group A B C D, Class II Div 1 2 Group E F G, Class III, Approval CSA C22.2, Applicable Standard NEC 500 to 503/505, Constructional Feature Dust Ignitionproof, Explosion-Proof, Used On Threaded IMC/Rigid Metal Conduit