Size of Milgard Windows casement channels for weatherproofing

A home owner from Morrison, CO says:
Do you know the width of the channel for weather stripping on casement windows manufactured by Milgard? I would like to order some from you if available. I just need to make sure I have the correct width measurement. It appears to be 1/8" but measured from the 2 inch mark on the tape measure but I need to be sure. Thanks.
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Tom from SWISCO responded:

I do not know that measurement off hand, unfortunately. You will need to remove a sample of the original wool pile and measure it to know what size you need. Most window manufacturers use a ton of different sizes for their different windows, so the only way to know for sure is to measure the original.

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