Imperial 4 in. D X 4 in. D Adjustable 90 deg Galvanized Steel Furnace Pipe Elbow

The 4" galvanized 90 degree elbow rounded double seams permit each section to turn freely without any chance of becoming disconnected. Highly durable, 30 gauge construction features a crimped end to easily assemble to furnace pipe and fittings of same diameter. Can be used to make angular or gradual turns.
Used to change the direction of airflow in round branch pipe
Adjustable from 0 to 90 degree
For all heating, air conditioning and venting where rigid pipe is required