... glow in the dark o ring 1.glow in the dark o ring Quick supply 2.Could Made By Client's demond 3.Many standards available Product: glow in the dark ... , HNBR, PU etc.Item nameO ringMaterialNBR,HNBR,EPDM,SILICONE,VITON,NR,CR,SBR,PUHardness30-100 shore ASizeCustomized/standard/ ... etcTemperatureCommon: -20~100degree centigrade;NBR(-40~120°C),SILICONE(-30~250°C),VITON(-25~300°C)Special featuresnon-toxic ...