**Multi-purpose: Rotary hood for ventilation ducts, chimneys and exhaust. The lacing provides maximum protection without hindering the performance of the chimney. Especially suitable for chimneys that are not frequently used. Stainless steel structure thickened fixed feet; includes a complete fixing kit. **prevents the re of the exhaust gases; facilitates the suction effect; improves the combustion; protects the chimney of outer influences such as rain or snow .The essay is ball bearing and makes absolutely no sounds during spinning.is used on fireplaces with the following fuels - coal, gas and pellets. For wooden fireplaces, the chimney must be at least 5-6 meters long. Because the high temperature in the chimney tube can influence the work of the camp. If you have any questions, please do not hesitate to contact us. Thank you for coming, wish you a happy life！