The FEP tube is a modified Teflon tube with improved color transparency, 200°C temperature resistance, and airtightness. Fluorinated ethylene propylene is abbreviated as FEP, and the full name is polyperfluoroethylene propylene. FEP is a soluble fluoroplastic that is based on PTFE in order to improve its insoluble properties and difficult processing. FEP has nearly identical properties to PTFE in terms of corrosion and wear resistance, but its temperature resistance is limited to 200 degrees Celsius. FEP material is simple to work with and weld.