vial 2ml | Sigma-Aldrichred PTFE/white silicone, diam. × thickness 8 mm × 0.060 in., for use with Screw Top vial, 2mL, 4.6mm I.D., 8-425 thread, pkg of 000 ea Supelco pricing Vi .5ml 9mm Short Thread Autosampler Vials ND9 are made of clear Type , Class A