Multi-layer Purification: This 3-in-1 indoor dryer vent kit includes a metal mesh screen, thickened cotton layer, and water tank to effectively trap airborne debris, helping keep indoor air clean. Compatible with 4 inch (101.6 mm) exhaust hoses Premium Material: Made of high-quality PP material with ideal corrosion-resistance and heat-resistance. Lightweight and deformation-free over time, it stands up to daily use and provides long-lasting performance Flexible Exhaust Hose: The 5 ft hose features a sturdy steel spring structure and thickened aluminum foil. With a 4.06 inch inner diameter, it is flexible and sturdy, fitting various setups and ensuring effective indoor ventilation Complete Accessories: Comes with all accessories needed for quick and easy installationno extra purchase required