90 Degree Elbow for 8" Diameter Single Wall Black Stove PipeThe AllFuel HST 8" diameter single wall 90 degree elbow is used to make a sharp turn in the stove pipe run, typically for through the wall installations where the pipe must transition from a horizontal to a vertical orientation. Our single wall stove pipe components are made of heavy duty 21 gauge carbon steel and painted black with high temperature paint for a long lasting, beautiful finish. Single wall stove pipe requires an 18" clearance to