The large O-ring has a 4.012" outside diameter and a 3.734" +/- 0.028" inside diameter. The thickness is 0.139" +/- 0.004"
The small O-ring has a 1.005" outside diameter and a 0.799" +/- 0.010" inside diameter. The thickness is 0.103" +/- 0.003".

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