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 pitch brand new and high quality Material: stainless steel Size: 270mm*240mm*150mm(10.6"x9.4"x5.9") Diameter:150mm Weight:758g/ 26oz Colour: Silver Package Content: * 1x Roof Ventilator