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 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 Applicable size: The dryer pipe connector is suitable for various 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 various ventilation needs; 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 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 professionals; 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 various settings, and its multifunctional size makes it suitable for most ventilation system upgrades or repairs Colour:White Material:Plastic Package Contents: 2 * Pipe Connector Only the above package content, other products are not included. 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. 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 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 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 Applicable size: The dryer pipe connector is suitable for various 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 various ventilation needs; 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 professionals; 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