Standard Autosampler Vial for HPLC & GC Chromatography, vials can be used for high performance liquid chromatography and gas chromatography for reliable analysis results Autosampler Vials, MS Lab Supply Insert Tube Sample Vials Glass 2ml Screw Top Clear Vials with Write-on Spot and Graduations 9-425 Type Threaded Vial and 9mm Blue ABS Screw Caps & Septa