Fixed Volume Control Knob,
Chemglass Fixed Volume Control Knob,; Fixed Volume Control Knob, 20µL, Fits Pipettes with Ajustable Volume: 5.0-50.0µL, Each - CHMGLS
Chemglass Fixed Volume Control Knob,; Fixed Volume Control Knob, 20µL, Fits Pipettes with Ajustable Volume: 5.0-50.0µL, Each - CHMGLS