... advantage:First,excellent anti-chemical character.It almost applies to all mediums.Second, temperature range is very wide.(Around -30°C to ... 200°C)Third,anti- compressibility function is very good.Four,long service life.Material:NBR,FFKM,VMQ,PTFE,PU ... your requirements )Operation conditions:Pressure:<=50MPaTemperature:-30°C ~ 200°C Good quality NBR O Ring