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FFKM perfluoroelastomer (equivalent to Kalrez) O-Ring, 1.191 OD, 1.051 ID - ORK-023 - Harrick Scientific Products Inc.
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330 Kalrez Perfluoroelastomer O-Ring, 4079 Compound, 75A Durometer, Round, Black, 2-1/8" ID, 2-1/2" OD, 3/16" Width (Pack of 1): O Ring Seals: Amazon.com: Industrial & Scientific
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