... Tightness good 2. Rubbing 3. Environmental protection material 4. Anti-corrosion PTFE has a wide range of practicable ... rods(teflon bars). The rod with diameter of 4 - 9mm is made by paste extrusion of dispersion polymerized ... molding.Specifications1) SFFBN: a) Diameter (mm): 1, 2, 3, 4, 5, 6, 7, 8, 9b) Length (mm): >2 ... ,0002) SFxBN:a) Diameter (mm): 4, 5, 6, 7, 8, 10, 12, 15, 16, 18 ...