Diffraction Grating 50 Lines Optical Spectrophotometer for Teaching Experiment

Spectrophotometer Transmission Grating with Multiple Line Counts Available

Diffraction Grating for Spectroscopy Experiment with Multiple Line Options

Optical Teaching Tool Diffraction Grating with Various Line Counts Available

Diffraction Grating 80 Lines/mm for Spectrophotometer Teaching Experiments

Diffraction Grating Spectrophotometer 50 Lines for Teaching Experiment

Diffraction Grating Spectrophotometer for Teaching 50 100 300 600 Lines

Diffraction Grating Spectrophotometer Optical Teaching Aid with Various Lines