Free sample gc vial caps with inserts for hplc system Vials Cap Septa for GC HPLC 2ml Aijiren Sample Screw Vials 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.