clear sample vials with cap for HPLC sampling Custom gc vials and caps with patch for hplc sampling Vials Cap Septa for GC HPLC Our product range includes a wide range of 2ml sample vials supplier 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.