1 O-Ring kit containing 166 Buna-N / Nitrile black o-rings Shore A 90 Durometer. The o-rings in this kit meet ASTM D2000 M7GBG910, A14, B14, EO14, EO34 standards. Nitrile has excellent oil resistence as well as good resistence to weather and tearing. 90 Durometer Nitrile is the recommended material for your scuba needs when you are not diving with a Nitrox mixture. For Nitrox diving, please check out other auctions and purchase the 90 Durometer Viton Kit. This kit contains the 12 popular AS568 sizes used in scuba/diving gear.
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