100-Pack Rubber Watch Case Back O Ring Round Gasket 3mm-63mm (1mm Thick) NBR 70
🀅 Material: Nitrile Rubber（NBR ）. NBR Black Nitrile. 🀅【Wide 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.