150ul Insert, conical bottom, 31x5mm for ND8 vials, 300/pk . 150uL Micro-Insert with Mandrel Interior and Polymer Feet, 29x5mm for 8-425 vials, 200/pk 250uL Micro-Insert, conical bottom, 31x6mm for 9mm vials, 300/pk TSH-CV2046 $59.99 . Low Volume Inserts - Microsolv Technology Corporation.