HPLC Micro-Inserts for 11mm HPLC S nap Vials There have three types of HPLC Micro Insert suitable for 9-425 hplc vials, I300, 300uL Micro-Insert with Flat Bottom, IV250 250uL Conical Micro-Insert, IP250-I 250uL Micro insert with Mandrel Interior & Polymer Feet.