Buy 250ul insert conical for hplc vials USA-Aijiren Hplc Vials China HPLC Vials Manufacturers, Suppliers, Company - Factory 250uL Conical Micro-Insert, 31*5.7mm, Suits for 9mm Vials 250uL Micro-Insert with Mandrel Interior, & Polymer Feet, 29 Application: Suitable for 8-425, 9mm, 10-425