Jun 04, 2020 · Aijiren 2ml Screw Hplc Sample Vials are cleaned and packaged in a certified Class 10,000 clean room according to a designed process, developed to eliminate chromatographic errors associated with vials. Package of 2ml Screw Hplc Sample Vials: Our products are packed in cartons. We will check that if the machine can run before it is sent out.