Nitrile Rubber 20PCS/Lot Black NBR CS 0.5mm thickness OD1.6/1.8/2.5/2.8/3/3.5/4/4.5/5/7*0.5mm ORing Gasket waterproof watch.-.

Nitrile Rubber 20PCS/Lot Black NBR CS 0.5mm thickness OD1.6/1.8/2.5/2.8/3/3.5/4/4.5/5/7*0.5mm ORing Gasket waterproof watch.-.

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