white tan PTFE/silicone, diam. × thickness 11 mm × 0.060 in., for use with 4 mL vial, pkg of 100 ea. white tan PTFE/silicone, diam. × thickness 13 mm × 0.060 in., for use with 7 mL vial, pkg of 100 ea. white tan PTFE/silicone, diam. × thickness 16 mm × 0.090 in., for use with 15 mL vial, pkg of 100 ea.