There are high performance liquid chromatography & gas chromatography consumables such as HPLC/GC screw vials with matched caps for laboratories. Here is the list of some screw vials: 9-425 Vials, 8-425 Vials, 10-425 Vials, 13-425 Vials, 10ml GC Headspace Vials, 20ml GC Headspace Vials etc. Want to Know More Please Leave Your Message !