IP250-I(Economy) IP250: VP91: VP93: Description: 300uL Micro-Insert, 31*6mm Clear, Flat Bottom, Suits for 9mm Vials: 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