Bridgeport 269-SRT 4 IN Steel Raintight Cplg, Box of 6
https://nsiindustries.com/product/bridgeport-269-srt-4-in-steel-raintight-cplg-box-of-6/
The Bridgeport 4″ Raintight Zinc-Electroplated Steel EMT Compression Coupling used to join two lengths of EMT conduit creates a concrete-tight, watertight seal and long-lasting fit in a wet location.