RV Designer Provent Dampened Vent Walnut. This dampened vent by RV Designer features an elegant walnut finish. Make the RV Designer H805 Provent Dampened Plastic Vent and the rest of your RV equipment stand out by adding this RV Designer H805 Provent Dampened Vent Walnut. The damper mechanism of RV Designer H805 Provent Dampened Vent Walnut easily opens and closes and may be completely removed for full flow. This RV Designer H805 Provent Dampened Vent Walnut w/ Walnut Finish features a 4" mounting collar with an overall 5" diameter 2.75" depth and it accepts all types of 4" flex duct. Make your RV purrrfect with the RV Designer H805 Provent Dampened Vent Walnut. Features of RV Designer H805 Provent Dampened Vent Walnut Accepts all types of 4" flex duct The damper mechanism can easily be opened and closed and may be completely removed for full flow Grill rotates a full 360 degrees to direct air flow where desired 4" diameter mounting collar; overall 5" diameter 2.75" depth Color: Walnut Package Contents: RV Designer H805 Provent Dampened Vent Walnut RV Designer H805: Provent Dampened Vent Walnut