1.Terials:NBR,silione,NR,SBR,etc 2.Various types and color are available 3.Good quality with competitive price ... 1.Terials:NBR,silione,NR,SBR,etc2.types of O-ring,E-type,U-type,etc,can make ... -Ring,Rubber Ring,Sealing Ring,SealingGasket. color rubber cap,rubber plug (SILICONE,EPDM,SBR,NR)