US$ 154.00
all faces polished and packaged in a wooden storage box
For image formation studies on optical benches
zero-offset rod
and core layers detach one by one for geology instruction
Three-times life size cross section exposes cortex
Economy Handheld Spectroscope, 6-Pack Capacity_10mL all faces polished and packagedDiffraction grating spectroscopes with a rotating slit cap, supplied as a small group pack for identifying visible light wavelengths from lamps and discharge sources.
US$ 154.00
US$ 35.99