NBR Ring 1.Various types,colors and materials 2.Good sealing 3.Good quality, reasonable price StandardOrNonstandard:Style: Size and Color:Material: NonstandardRubberRingas your requests,drawings or samplesRubber(NBR,SI, Viton,EPDM, etc.)FOB Port:Shanghai/ NingboPlace of Origin:Zhejiang China (Mainland)Application:used in concrete pump truck,concrete pump andpipeline connection seal in ...