10PCS Watch Gasket O Ring Rubber Seal Watch Back Cover

[Size] - 30-35mm Diameter, 0.5mm Cross-Section Diameter [Hardness] - 70A Durometer (Shore Hardness) for resistance to penetration [Nitrile Rubber] - Standard Nitrile Butadiene Rubber with a wide temperature range from -4℉ (-20°C) to 212℉ (100°C). The o rings has smooth surface, great oil and heat resistance, wear-resistant and good sealing performance [Application] - These small rubber o rings are widely used for automotive, pressure washer, filter, pump, water hose, plumbing pipe, engines, valves, air conditioning maintenance and much more [NOTE] - Please confirm the required size and material before purchase, and put it in the right place TICFROG CUSTOMER SERVICE - All TICFROG products carry a full satisfaction guarantee within the 18 months of purchase. If for any reason you are unsatisfied , you can contact us directly, we'll respond within 24hrs. Customer satisfaction is our top priority and we aim to make every TICFROG customer a customer for life. Watch Back Cover Seal Gaskets