wide opening headspace gas chromatography with screw caps DWK Life Sciences Chromatography Vials | VWR Description: The original wide-opening vial available for chromatography. ,97046-988PK,97046-964PK,97046-996PK,97046-968PK,89217-240PK,97046-966PK,97046-958PK 10-425 Wide Opening Glass Screw-Thread Vials, Thermo Scientific