I-9mm PP ye-vial ephezulu ye-vial inokwenziwa ngePolypropylene okanye i-Polymethyl Pentene (PMP). I-Polypropylene yeyona nto ithandwayo yeplastiki. I-vials ye-polypropylene inamamela obushushu ukuya kuthi ga kwi-135 degrees Celsius kwaye isetyenziswa ngokuqhelekileyo kwi-chromatographic cels. I-vials zeplastiki zinamachaphaza amakhamamikhali, ulwakhiwo olulula, ukuqina, kunye noqoqosho.