Adjustable Air Outlet: Turn the center disc to open or close the vents. The airflow can be precisely adjusted according to your needs, ideal for walls and ceilings. Removable Design: The disc on the vent is removable, making cleaning and maintenance easier. With just a slight rotation and wiping with a damp cloth, the vent will be as good as new. Versatile Use: The disc valve can be used in the air inlet (indoor) and air outlet (outdoor), ideal for bedrooms, bathrooms, kitchens, small offices, attics. Compatible with 75mm suction hose. High-quality Material: The fan is made of high-quality ABS plastic, which is sturdy and abrasion-resistant, odorless and safe. The vent is compact and stable. Easy installation: with the reverse buckle device, slide the vent cover into the previously opened hole, turn slightly for fixation - Secure the pipe connection with hose clamps Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!