Product Description Dundas Jafine TDIDVKZW Indoor Dryer Vent Kit with 4" x 5' Duct From the Manufacturer This ProFlex indoor dryer vent kit includes a 4-inch by 5-foot UL 2158A listed and marked ProFlex transition duct, a plastic lint reservoir, and 2 plastic clamps. This item is used to vent your electric dryer indoors when outside venting is not possible. It is ideal for apartments, condominiums, and RVs Never use this product with a gas clothes dryer.