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Premium Member
1,924 Posts
It is an RU-4710

I got mine from aj usa for 46.28 free shipping and no handling charge.

Sure beats paying 70 or what ever prodesign sells them for.
I called kn and gave them the numbers on the top and bottom of the old filter and they said that it could be one of two filters. Just measured the length of the filter to see which one it was.
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