Item Type: Roof Ventilator Material: Stainless Steel Weight: Approx.210g / 7.4oz Package List 1 x Roof Ventilator (Total 3 Accessories) Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 1Automatic Silent: This roof ventilator is a reliable rotating, automatic working, continuous and silent operation with maintenance costs. 2Functional: Designed to release your roof air in just a few minutes, unaffected by rain and moisture, suitable for chimneys that are not used frequently. 3Stainless Steel Material: Stainless steel material is very strong and resistant to rust. It can also withstand high temperatures and acid and alkali corrosion, making it suitable for use in harsh conditions. 4Sturdy and Durable: Premium roof ventilator is sturdy, durable and ideal for residential or light commercial use. 5Operation Principle: This chimney hood ring is specially designed to be very effective in preventing wind and increasing ventilation.