This is the BRID Duct Rail Fan DC Basic 40 in white. Size: Approximately 177mm in height. This small fan is designed for duct rails, commonly found in homes, stores, and offices, and is intended to be attached to the lighting duct rail on the ceiling to promote air circulation. It can be turned on and off with the included remote control, allowing for easy ventilation and circulation wherever needed. Installation and removal are quick and easy with a one-touch system. With a diameter of 40cm, it's compact and lightweight, making it suitable for environments where large ceiling fans are difficult to install, or in smaller rooms like restrooms. It's a thoughtful item that can easily upgrade your living environment. Please check the images to assess the condition. Please refrain from purchasing if you are overly concerned about minor details.