VWR® Autosampler Vials, Inserts and Closures - the complete line of VWR vials for Chromatography. Vial choices include: Crimp Top, Snap Top, and Screw Top vials with a selection of closures. Refer to the Autosampler Compatibility Table on pages 12-13 to determine which vials, closures, and inserts will work on your specific autosampler unit.