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 o ring ... contains: NR, CR, NBR, SBR, VITON, SILICON, HNBR, PU etc.Item nameO ringMaterialNBR,HNBR,EPDM,SILICONE,VITON,NR,CR,SBR,PUHardness30 ...