Description Vial Kit, Snap Cap, 2 mL Clear + PTFE/Silicone, preSlit and Caps with Bonded-In Septa. Fisherbrand Autosampler Vials, Inserts and Closures Brochure. Vial choices include: Crimp Top, Snap Top, and Screw top vials with a selection of 2mL, 12x32mm, 9mm Wide Opening Short Screw Thread Vials and Inserts. Vials 2 ml 12×32 | Sigma-Aldrich