K9 Optical Glass Laser Reflection Grating Light Spectral
25x25X6mm,100, 300, 600, 1200, 1800, 2400 Lines with different Shine Wavelength.
Material: K9 Optical Glass
Specifications: 25x25mm (+0 / -0.1mm)
Thickness: 6mm (+/- 0.2mm)
Coating type: aluminum film