PTFE/red rubber, diam. × thickness 9 mm × 1.0 mm. Pricing. 27156. PTFE/red rubber, diam. × thickness 13 mm × 0.050 in., for use with 7 mL vials. Pricing. 27101. PTFE/red rubber septum, seal diam. 11 mm, pkg of 100 ea, for use with 2mL-2.5mL standard opening crimp top vials.