This brass vapor return coupling is 3 3/8 in. long and is available with 2 1/4 in. Female ACME threads on one side and 1 1/4 in. male NPT threads on the other. The temperature rating is -20 to 160°F/ -29 to 71°C.
Emerson Fisher 1 1/4 in. Male NPT x 2 1/4 in. Female ACME Vapor Return Coupling