4 Inch Stainless Steel Dryer Vent Cover Diameter ?:4 Inch D-shaped rings are set for

D-shaped rings are set for hanging the ducting freely

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for connecting two ducting of different diameters or for connecting hose to inline fan/exhaust vent

High-Quality Dryer Vent Kit: Indoor dryer vent kit for electric dryer

more secure seal between your hose and the reducer

4 Inch Stainless Steel Dryer Vent Cover Diameter ?:4 Inch D-shaped rings are set forFeatured SUS 304 stainless steel material; Strong Anti corrosion,non toxic. Fly screen mesh effectively prevents anti insect from entering. U shape with drainage channels special design,waterproof and rain resist. Light paint surface to resist rain, anti dust and rusty,more durable. Buckle installation make a better connection between the ventilation and wall.