They can be used for flue gas, ventilation ducts, etc. Designed to protect pipes from precipitation, as well as to increase traction.
Chimney Anti-Wind Cowl Flue Liner Spark Arrestor Rain Cap Duct Pipe Cover
Chimney Anti-Wind Cowl Flue Liner Spark Arrestor Rain Duct Pipe Cover Protector
Mi Flues 2-150-091Chimney Anti-Wind Cowl Spark Arrestor Rain Cap Duct Pipe Cover
Stainless Steel Flue Liner Pipes, Bends, Rain Cap, and more for stove chimney
STEEL FLUE LINER PIPE ELBOW RAIN CAP from 4 inch / 100 mm to 8 inch / 200 mm
100 mm BLACK STEEL FLUE LINER PIPE BEND RAIN CAP WALL BRACKET
