Product review (1 stars): Buy the Lambro #289W
Do not make the same mistake I did.  If you buy the item from Battic Door Energy Conservation Products, they will send you the Lambro #289W, which is sold at $11.99.  They post a different picture and model # to make you think you are buying a different product, but you are actually buying the Lambro #289W 4" Dry Vent Seal.