Q: What is the material of stainless steel filler? Answer: The edge material is filled with polytetrafluoroethylene; The shell material is SUS304. Q: Is the seal suitable for high pressure, high speed, and high temperature? Answer: Pressure: Vacuum to 1.5MPa (special type 6MPa); Speed: 25m/s (special model 40m/s); Temperature: -60℃ to+300℃ Q: What is the service life of the seal? When can we receive the ptfe oil seal? Answer: China Post is valid for delivery for 15 to 30 day