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Cannon-Fenske Opaque Viscosity Tubes, Uncalibrated
Cannon-Manning Vacuum Viscosity Tubes, Calibrated
Ubbelohde Viscosity Tubes, Calibrated
Cannon Ubbelohde Viscosity Tubes, Calibrated
Zeitfuchs Cross-Arm Viscosity Tubes, Calibrated
Cannon-Fenske Opaque Viscosity Tubes, Calibrated
Cannon-Fenske Routine Viscosity Tubes, Uncalibrated
Cannon-Fenske Routine Viscosity Tubes, Calibrated