Micro-Inserts for Short Thread Vials ND9 with wide opening 3.5.11 HPLC and GC Certified Vial KITs (Short Thread Vials and Short Thread Seals ND9). Filter Vial FAQ's. Same Size as a standard HPLC Vial and will fit easily into any machine or tray include all sample types to be analyzed by HPLC, UHPLC, LC-MS, and GC-MS.