Product Description. SDS. 27351. black Viton®, diam. × thickness 11 mm × 0.060 in., for use with 4 mL vial, pkg of 100 ea. Pricing. Match Criteria: Keyword. Aluminum cap and red PTFE/silicone septum, for autosampler vials 12 x 32 mm standard opening. Aluminum cap and red PTFE/silicone septum, for autosampler vials 12 x 32 mm standard opening.