HPLC Micro-Inserts for 8-425 HPLC Vials There have five types of HPLC Micro Insert suitable for 8-425 hplc vials,I250uL with Flat Bottom,Conical Micro-Insert IV150,IP150 Micro insert with Mandrel Interior & Polymer Feet, IV150-I(Economy), and IP150-I (Economy) 2. HPLC Micro-Inserts for 9 -425 HPLC Vials