Topaz EMT connectors with set screw type assembly provide secure concrete tight protection when taped and are available in trade sizes from 1/2" to 4". Applications include use in dry locations to bond EMT thin wall conduits to electrical boxes or enclosures; set screw connectors offer superior corrosion resistance. Model sizes 2-1/2" to 4" are suitable for both EMT and rigid conduit. Constructed of durable zinc die cast, efficient and long lasting; UL listed. NEMA/ANSI FB-1 compliant.