None Toxic Sealing Medical and Chemical Seals PFA FEP Encapsulated FKM Silicone O-Rings PTFE Encapsulated Rubber O Ring - China Oring Seal, As568 | Made-in-China.com
PFA Coated Rubber Sealing O Ring PTFE Encapusulated FKM/Silicone Coated O-Ring - China FEP Encapsulated, FEP O Ring Material | Made-in-China.com