China Hplc Vial Inserts Manufacturers, Suppliers, Company . 250uL Conical Micro-Insert, 31*5.7mm, Suits for 9mm Vials 250uL Micro-Insert with Mandrel Interior, & Polymer Feet, 29*5.7mm, Suits for 9mm Vials 0.3mL Clear PP Short Screw Micro-Vial, 9mm Thread, 11.6*32mm . Vial Insert, 250 uL, Glass, conical, 100/pk: Amazon.com