Headspace Vials for CTC Autosampler – 10 mL, 20 mL – Sigma-Aldrich Online Catalog Product List: Headspace Vials for CTC Autosampler – 10 mL, 20 mL SU860106 Crimp seals with Viton ® septa silver seal, magnetic (with 8 mm center hole), diam. × thickness