240W USB C Adapter Power Meter Tester Transparent PD240 Wattage LED

Pocket Eye Chart Dual Sided Snellen & Rosenbaum Vision Tester for Home,...

Eisco Labs Direct Vision Spectroscope in Metal Case

Quarts glass Ampoule pH tester (unused)

CP12 Optical Polariscope Lens Stress Tester Lens Multifocal Testing Strain Meter

Dental Transcutaneous Bilirubin Jaundice Tester Meter/Phlegm Suction Unit US

Children Fixation Stick with Red/Green Anti-Suppression Check Vision Tester

one New Lab Instrument Benchtop pH Meter Tester 0.00~14.00pH 0 ~ ±1800mV