High Quality Material: Made of high quality 304 stainless steel high quality thick not easy to deform anti-rust. Built-in screen fine mesh prevents animal from entering. .Dome Cover Design: The 100mm dome cover is designed to withstand wind and rain and also prevents unnecessary leaks and airflow. .Wide Application: Suitable for all 4-inch diameter pipes such as tumble dryer exhaust pipes hoses household vents air extractors air conditioners kitchen fans gas electric dryers range hoods and various industrial applications. .Easy to Install: just push-fit duct and fittings together. Perfectly suited Bathroom or Kitchen extractor fan Hydroponics fan or In-Line Extract Fan.Please wear gloves while installing .Satisfaction Guarantee: We provide great customer services to answer questions and resolve any issues quickly with full satisfaction guaranteed. Or we will help you solve your problem as soon as possible if you are not satisfied for any reason. .