Gas Chromatography-analysis Lab 2ml chromatography vials for wholesales Vials With . 2mL,Clear Glass,12*32mm,Flat Base,9-425 Screw Thread Vial with White Write-on Patch and Graduation Lines. 100pcs/pk. USP Type 1,Borosilie Glass2ML-9-V1003 2mL,Aer Glass,12*32mm,Flat Base,9-425 Screw Thread Vial. 100pcs/pk. USP Type 1,Borosilie Glass