Offer a wide range of O-ring in all standard size and a lot of special size. 2. All o-ring are made according to international standard: ISO 3601, AS 568A, DIN3771, JIS B2401. Material: Nbr 30, nbr 70, nbr 90, viton 70, viton 90, epdm, silicone, hnbr, cr, nr and so on; Type: 102pcs, 225pcs, 382pcs, 386pcs, 404pcs, 407pcs, 419pcs and so on;
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