1. MATERIAL: 304 STAINLESS STEEL: The chimney hood is made of 304 stainless steel, ensuring it will not rust, fall off, or break. It is easy to clean and has a long service life. Its sturdy construction can withstand wind speeds of 200 km/h and a load of 100 kg without damage or deformation. 2. THE BENEFITS OF THE FIREPLACE CAP: This thick, rotatable stainless steel chimney hood fits most standard chimney heads. It effectively blocks wind and improves ventilation, preventing wind from entering pipes, fireplaces, ovens, etc. It also protects your fireplace from rain and moisture. 3. OPERATING PRINCIPLE: Utilizing natural wind and the temperature difference between indoor and outdoor air, the resulting heat convection drives the turbine to rotate. The hot air inside the room is expelled through centrifugal force and negative pressure. Suitable for industrial plants, livestock farms, residential chimneys, etc. 4. SIZE: The base diameter fits most standard chimneys, with options of 110mm, 150mm, 160mm, 200mm, and 250mm to accommodate common fireplace attachments. Features a stainless steel construction with thickened fixed feet and includes a complete strap attachment kit.