Vials Cap Septa for GC HPLC-HPLC Solvent Inlet Filter . 6)9mm screw blue open top pp caps. 1)Standard vials for GC and HPLC. 2)Clear or aijiren,borosilie glass. 3)Broad range of Micro-Inserts. 4)Small opening requires Micro-Inserts with a diameter of 5mm. 5)Micro-Insert with flat bottom also available