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 slimline, 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, continuously 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 VentilatorIf you have any questions, concerns, or need further information, please feel free to contact us anytime. Our team is dedicated to providing you with support and answering any inquiries you may have. Your satisfaction is our ultimate goal.We look forward to offering you top-quality products and service!Thank you for your support