C4011-631 - MicroSert™ Glass Flat Bottom Insert, Fill Marking, 400 . MicroSert™ Glass Flat Bottom Insert, Fill Marking, 400 µL, 6x31 mm, 500/Pk, Manufacturer: Thermo Fisher Scientific, Height: 31mm, Volume: 400 µl, Fisherbrand™ Glass Autosampler Vial Inserts - Fisher Scientific Fisherbrand with spring bottom micro insert with glass flat base