Hy-C Dryer VentGuard, crafted from durable 100% stainless steel with a polyester powder-coated finish, ensures longevity and resistance to rust and corrosion. Designed to prevent small animals from nesting in exhaust vents, it features a convenient keyhole attachment for easy removal and cleaning. Suitable for both 3" and 4" dryer or bathroom vent holes, this vent guard offers a versatile solution for your home. Comes with a lifetime warranty.