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When you receive your new Pet Door it
will be mounted in the fixed door track of your patio door.
For the purpose of ordering your door you only need to measure the opening
height of the sliding door channel.
Make sure that you measure from the extreme bottom of the track. If the rail
continues to the side jam, place your tape alongside the rail.
Very Important: When measuring your door opening, always round down to the
next lowest 1/8 th. of an inch.
Example: If your opening height measures 94 and 9/16th. inches. Then you
want to select 94 on the inch scale and ½ on the fraction scale.
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