The Lambro brown plastic louvered clothes dryer exhaust vent kit featuring 4 in x 5 ft foil flex UL 2158A is ideal for venting through the wall. This kit is used for clothes dryer exhaust and other general venting applications that require moist air and humidity from exiting the home. The built in flaps prevent back drafts and critters from entering the home through the vent. The plastic vent has a UV additive to prevent premature fading due to the sun.