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Review title: Be careful ordering this
Product review: As you can see, this is supposed to be a 5" vent. That size is needed by many portable air conditioners. Unfortunately, although the shipping invoice will also say it is 5", what arrives is a 4" vent. In fact, if you go to that product page, under Product Dimensions it says: 4.5 x 4.5 x 4 inches. It will not fit a 5" duct.Addendum: the seller was very nice and incredibly fast about refunding my cost, including shipping. But I can't help noticing that the size miss-labling hasn't been fixed yet.
