4 inch copper exterior side wall cap with damper and screen luxury metals llc our copper wall vents make a beautiful addition to any home. they are shipped double boxed with bubble wrap. there is a protective sticker to keep the copper safe from scratches and blemishes that must be removed before installation. all copper wall vents feature a 5 inch throat extension to make installation quick and easy. sturdy copper outside wall vent exhaust with damper and screen. 16 oz copper. 26 gauge quality *this vent is not for dryer vent use - building code for dryer vents requires that they have damper door only and no screen because they will plug with lint - please refer to our other products for this purpose - https://www.amazon.com/dp/b078dmm3tm?ref=myi_title_dp