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Ningbo Robon Sealing CO.,LTD is a famous rubber products manufacturer in Ningbo, we produce various rubber products: rubber seal, rubber o ring ,square ring, o ring cord, Quad ring,rubber flat washer, special parts and other rubber products.  The main material we used are NBR, EPDM, VITON, AFLAS, HNBR, SILICON, FFKM or approved by FDA, NSF, WRAS etc. We have the most advanced vulkameter, hardness tester, projectors, image instrument,tensile testing machine, and other professional testing equipment. The company is located in Ningbo City, Zhejiang Province, P.R.China. Which is a seaport city with the most economic vitality near the east sea. North link to Shanghai by 2hours drive, and East link to enjoy the most convenient Sea, Land and Air transportation advantages. Robon ...