Flat Micro Inserts for 2ml Snap Hplc Vials for Price. Conical Vial Insert, 250ul, 100/pk. Flat Bottom Vial Insert, 250ul, 300ul. Micro Inserts for 2ml Hplc Vials for Manufacturer. All Kinds of 9mm Vials in Aijiren. Micro Insert with Mandrel Interior & Polymer Feet. Micro Inserts for Hplc Vials for wholesale.