12.7X12.7X6mm 1800 Lines K9 Optical Glass Laser Reflection Grating Light Spectral
300, 600, 1200, 1800 Lines with different Shine wavelength
Material: K9 Optical Glass
Specifications: 12.7x12.7mm (+0 / -0.1mm)
Thickness: 6mm (+/- 0.2mm)
Coating type: aluminum film