24mm/0.9"

20Pc Black Rubber Round Flat Washer Assortment Size 14x24x3mm Flat Washer

A nice touch on REFRATECH models is the clear labeling for quick setup.

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10 Pack 14x24x3mm Black Rubber Round Flat Washer Assortment Size Flat Washer

I bought this Emerson model based on a friend's long experience.

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