https://www.acehardware.com/departments/heating-and-cooling/chimney-and-flue/stove-pipe-elbows/40801
Imperial 8 in. D X 8 in. D Adjustable 90 deg Galvanized Steel Elbow Exhaust Mfr# GV0302-A - Ace...
For all heating, air conditioning and venting where rigid pipe is required. The 8" galvanized adjustable elbow is used to make angular or gradual turns. It can...