Features:High Quality Roof Ventilator is sturdy, durable and made form high quality weather resistant materials. It offers the performance of standard roof venting systems but in a imline, low finish which is designed to releases your trapped air in your roof space by as much as 50 degrees in just minutes.This Roof Ventilator is a dependable rotary that works automatically, continuouy and silently without operating or maintenance costs.Premium-grade stainless steel dual ball bearings with integrated molded shield to protect bearings raceway.Internally and externally braced; permanently lubricated ball bearings.Ideal for residential or light commercial use.Specification:Stainless steel turbines fits any roof100% new and high qualityMaterial: stainless steelSize: L:270mm*240mm*200mm (10.6"x9.4"x7.9")M:270mm*240mm*150mm(10.6"x9.4"x5.9")Diameter:150mm/200mmWeight:758g/ 26ozColour: SilverPackage Content:* 1x Roof VentilatorOur products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days.When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specificationsWe want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don&39;&39;t hesitate to contact us. We are here to help and will do our best to assist you.Thank you for choosing our product. We hope you enjoy it"