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 roof pitchMaterial: stainless steelSize:270mm*240mm*150mm(10.6"x9.4"x5.9")Diameter:150mmWeight:758g/ 26ozColour: SilverPackage Content:* 1x Roof Ventilator