Various monomers are used within the manufacture of FKM polymers. These include VF2 (2-fluoroethene), HFP (hexafluoropropylene), TFE (Tetrafluoroethylene), PAVE/PFVE (Perfluorovinylether), Ethylene and Propylene. Depending on the combination of monomers. the resulting polymer will have different properties, these might range from ultra-low temperature performance to improved base and acid resistance.