Vials Cap Septa for GC HPLC - 2ml Aer Sample Screw . Vials Cap Septa for GC HPLC Our product range includes a wide range of 2ml aer sample screw vials, 250ul conical micro-insert, vial micro-insert, 1.5ml clear screw neck vial w/write-on spot, hplc solvent inlet filter and inlet filters, debubbler.