Features: -Made of high quality 304 stainless steel, anti-rust, anti-corrosion, wear-resistant, sturdy and durable. -With a diameter of 150mm, it is suitable for all types of duct ventilation. -It uses thicker protective net to effectively prevent insects and rats from entering. -The hemispherical cover design is windproof and rainproof and can adapt to various severe weather conditions. -Suitable for tumble dryers, exhaust fans, range hoods, air conditioners, gas, electric dryers, etc. Specifications: Colour: silver Material: 304 stainless steel Diameter: 150mm .