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