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The Topaz line of raintight EMT couplings feature an easy to install compression type assembly and provide secure, concrete tight and raintight protection when joining ends of thin wall EMT conduit together. Featuring built to last steel construction with a zinc plated finish for durability and longevity; available sizes from 1/2” to 4”. Most sizes UL listed. NEMA/ANSI FB-1 compliant.