Function: 1. Basic Material: High quality stal stainless, durable and reliable, can effectively resist the erosion caused by wind and rain.2. With Clamp: Easy to install and provides a tight fit for your chimney opening, preventing dust and rainwater from entering.3. Ventilation effect: Ensures optimal ventilation performance, improves combustion efficiency, and reduces the risk of ash accumulation and reversing from the chimney.4. Safety: Effectively prevents small animals and rainwater from entering the chimney duct, protecting the integrity and operation of the chimney.5. Suitable: Designed to release air from the roof space in just a few minutes, resistant to rain and moisture, especially suitable for rarely used chimneys.Specification: Item Type: Rotating Chimney Fan Cover Weight: 1138 g 40,14 oz Material: Stal Applicable facilities: for home and commercial use. List of packages: 1 x chimney cap 1 x Clamp