and sturdy material: The 6-inch to 4-inch air duct reducer is made of high-quality ABS material, and the design of the air duct reducer has a long service life; Not only beautiful and elegant, but also waterproof and not easily deformed, suitable for outdoor or indoor use; Smooth and neat edges tight docking and improve ventilation efficiency_x000D_ Sufficient quantity: Two ventilation adapters per package for the dryer to you have sufficient ventilation needs; The quantity is sufficient to use and replace, and can also be shared with your friends and others_x000D_ Applicable size: The dryer pipe connector is suitable for sizes of air ducts, and sizes ranging from 100mm to 150mm are perfect for connecting 6-inch and 4-inch air ducts, making it a wise accessory to meet ventilation needs;_x000D_ On hand, the outer diameter size of the 150mm pipeline reducer is 6.18 inches and the inner diameter size is 5.90 inches; On the other hand, the outer diameter size of the 100mm pipeline reducer is 3.89 inches and the inner diameter size is 3.66 inches, which can meet your and requirements_x000D_ Convenient and easy to install: 4-inch pipe connectors are a suitable solution for homeowners who want to improve ventilation systems but do not want to hire ; Its design makes it easy to install without the need for other tools; Glue, tape, or steel clips can also be used to achieve stronger connections Widely applicable: This 6-4-inch air duct reducer is commonly used in residential and commercial ventilation systems, HVAC systems, air conditioning, range hoods, garages, attics, bathrooms, kitchen fans, etc; The air duct reducer is very suitable for settings, and its multifunctional size makes it suitable for most ventilation system upgrades or repairs_x000D_ Colour:White_x000D_ Material:Plastic Package Contents:_x000D_ 2 * Pipe Connector Only the above package content, other products are not included._x000D_ Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_