Home » News » 4ml 13mm Screw Vials » 4ml 100pk Amber Vial for Restek Professional 100pk Sample Vial for Restek Biotech-Aijiren Headspace Vials 100pk Sample Vial for Restek Biotech 2015-2016 restek catalog 25 g vial 685-27-8 35617 TFAA (trifluoroacetic acid anhydride) 10-pk. (10x1 g) 407-25-0 35618 25 g vial 407-25-0 35619 sample analysis by GC.