Ningbo RuiBao Sealing CO.,LTD is a famous rubber products supplier in NingBo and produce various rubber products involving: rubber seal, gasket, washer, rubber o ring ,rubber flat washer, non-standard parts and other related productions. The main material we used are NBR, NR, EPDM, Viton, SBR, CR, HNBR, Silicon 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. its North link to Shanghai by 2.5 hours drive, and east link to enjoy the most convenient Sea, Land and Air transportation advantages.