Chimney Cowl Cap Rigid design and reliable mounting method ensures that the cap is as durable and aesthetic as a traditional chimney cap. Unique mounting method, with no usage of tools needed, universal sizes and simple installation, makes it a good solution for all chimney pipe endings. Universal size: 75/110/160mm. Material: PVC NOTE: The size is the inner diameter of the cylinder under the hat. TIPS：The inner diameter of the rain cap interface is 100mm, which is suitable for the interface with an outer diameter of 100mm Destination - Ending of PVC round chimney pipes; - protects the chimney duct from rain or snow. If you have any doubts about the product, please send us an email, we will give you a satisfactory reply as soon as possible