The Bridgeport 290-MS 1/2-Inch Steel Combination Coupling joins two lengths of rigid or IMC conduit to EMT conduit. The zinc-electroplated steel protects from rust or corrosion and features concrete-tight internal sealing rings. With an overall length of 1-15/32 inches and a 1-1/8-inch diameter, the coupling is solidly built to meet construction and general industry OSHA-recognized, NRTL-listed electrical standards and the stringent bonding and grounding requirements of 514B cULus. Bridgeport's wide selection of products is manufactured for innovation, consistency and quality — providing you with connectors, couplings, or transition fittings that are safety listed, ensuring code compliance to meet your needs enabling you to do your best work at a lower total cost. We build every product with the same goal in mind: guaranteeing a fast, professional-grade, trouble-free installation. When you need a solution you can depend on, be sure to look for Bridgeport Orange.