https://www.3doptix.com/catalog/optics/grating/mks-newport/33009FL01-266R
Optics | Grating | MKS/Newport | 33009FL01-266R 25 x 25 x 6 mm Float Glass Plane Ruled Diffraction...
"Discover 3DOptix's 33009FL01-266R 25 x 25 x 6 mm Float Glass Plane Ruled Diffraction Grating with 900 grooves/mm, coated for 588 nm wavelength. Ideal for...