... 1:Material:NBR,Silicone,FKM,etc. 2:Various type:TC,TB,TA,Etc. 3:various size. Rubber oil sealing NBR1) Material: top ... grade silicone/rubber material; NBR,HNBR,SILICONE, FKM,NR ... ,CR,EPDM,PTFE OR AS YOU REQUIRED. 2) Optional shapes and colors 3) Working temperature ...