Certified .5mL 9-425 screw neck Vial with patch for aijiren Technology HPLC .5mL 9mm Short Thread Vial ND9. . Short screw Thread ND9 vials (.6*32mm) for GC and HPLC. 6.Short screw Thread ND9 vial is designed to ensure proper centering of limited volume inserts,eliminating missed injections. 7.Vials are manufactured of Clear or Amber borosilicate glass. 8