[Dryer Exhaust Lint Collector] This kit includes three lint collection bags and three Velcro patches, compatible with 4-inch (approx. 10.2 cm) dryer vents, ducts, and external vent covers. [Unique Design] The dryer exhaust lint trap bag features a circular stripe stitching that attaches to the Velcro patch. Its design allows for easy removal and regular cleaning to keep the dryer working efficiently. [Premium Materials] These dryer exhaust lint collection bags are made of high-quality polyester, making them durable and reusable. They are resistant to sun and rain, making them effective both indoors and outdoors. [Efficient Capture] These dryer exhaust lint collection bags are designed to capture and collect lint during the drying process, helping to prevent dryer exhaust vent blockage and maintain dryer performance. [Multi-functional] In addition to collecting lint, these dryer lint collection bags provide extra protection by preventing birds, mosquitoes, and other small animals from entering the ventilation system. Color: Black Material: Polyester Package Contents: 3* Dryer Ventilated Cotton Flannel Bags 3* Stickers 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.