5 Pack 1/4" Male NPT x (2) 1/4" Female NPT Branch Tee Brass Union Tee Pipe Connector1 4" FNPT x 1 4" MNPT Brass Male Branch Tee (5 Pack) These are 1 4" FNPT x 1 4" MNPT brass male branch tees that measures approximately 1 1 2" in length, 1 1 4" tall, and 11 16" wide. This is a T shaped fitting that is used to connect two male pipe ends to one female pipe end and features NPT threads for a tight seal. Since this is a brass union, it can be used with brass, bronze, copper, steel, aluminum, and iron pipes. If you have any questions