Rubber O Ring 1.Various types,colors and materials are available 2.Sealing property is good 3.Good quality,reasonable price StandardOrNonstandard:Style: Sizeand Color:Material: NonstandardRubberO Ringas your requests,drawings or samplesRubber(NBR,SI, FKM,EPDM, SBR,NR, etc.)FOB Port:Shanghai/ NingboPlace of Origin:Zhejiang China (Mainland)Application:used in concrete pump truck,concrete pump ...