Reply To: O ring size.

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May 2, 2019 at 8:45 pm #174721
olcah
Participant

    US Member

    I believe all RDs at least thru RD18 are the same. For RD18 size is 11/16 inch OD x 1/2 inch ID. That would have 3/32 inch thickness. I have bought from an assortment that VIP Auto had behind the counter.