I bought it for front and patio doors. There was a smaller gap through which air flowed. The application of the strips turned out to be VERY easy. Simply measure the length of the cut, peel off the backing from the adhesive and press firmly where you need it. CONS: The strips were present and ok. but the first few times after opening and closing the doors, the protective film wouldn't stick and wouldn't stay. clean thoroughly. then it dried before applying the strip. I'm sad it didn't even last two full days but more upset at the waste of money.
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