1″ Compression Coupling — Black – Law Supply, Inc.
Crouse-Hinds 663 1-1/4" Steel Compression EMT Coupling | Cooper Electric
Amazon.com: Eastman 3-7/8 Inch Long Pattern Compression Coupling, 1/2 Inch IPS, Galvanized Steel, 20562 : Everything Else
Eastman 4-1/8 Inch Long Pattern Compression Coupling, 3/4 Inch IPS, Galvanized Steel, 20564 - Amazon.com
3” Pipe Compression Coupling
Sigma ProConnex 1/2-in Electrical (EMT) Zinc-plated Steel Compression Coupling Conduit Fittings (5-Pack) in the Conduit Fittings department at Lowes.com