This is a 33025FL01-201R 12.5 x 12.5 x 6 mm Float Glass Plane Ruled Diffraction Grating, available from MKS/Newport. The grating has 150 grooves per millimeter and is coated with a front coating of nwr 53201r105511p.
The grating is a Blazed Ruled Reflective type, with a base shape of a Rectangle. The geometry of the grating includes a width of 12.5 mm, a height of 12.5 mm, and a thickness of 6 mm. The grating has no inner or outer radius.
The grating is designed to operate at a wavelength of 588 nm. The blaze wavelength of the grating is 500 nm, with a blaze angle of 2.2 degrees. The orientation vector of the grating is x=1, y=0, z=0. The grating is a first-order grating, and the grating side is the front side.
The grating is made of soda lime ru clear material. The grating's web links are valid and in stock, making it readily available for purchase and use.