Chrominex amber LC-MS vials manufacturer factory wholesales Screw thread vials & closures for HPLC, GC, MS applications. There’s a Thermo Scientific screw top vial for every HPLC, GC, MS instrument, application, and budget. Our screw top clear and amber glass vials and plastic screw top vials are available in 8mm, 9mm, 10mm, and 13mm screw threads.