Micro-inserts are used to reduce the volume of standard sample vials for Aijiren 250UL INSERTS /WIDE OPENING CLEAR GLASS CONICAL BOTTOM-SPRING. Vial Insert, 250 uL, Glass, conical with Polymer feet, deactivated . Brand Name, Aijiren Technologies. Item Weight, 3.53 ounces. Model Number, 89. Number of Items, 100. Part Number, . UNSPSC Code, 41000000 300uL Limited Volume Flat Bottom Vial Inserts, 100/pk - Filtrous