This is a 33025FL01-270R Float Glass Plane Ruled Diffraction Grating, sourced from the reputable vendor MKS/Newport. The grating, which is 12.5 x 12.5 x 6 mm in dimension, is a Blazed Ruled Reflective Grating with a Sub Type of Rectangular.
The grating is made of soda lime ru clear material, a common choice for its excellent optical properties and durability. It is designed to operate at a wavelength of 588 nm, making it suitable for a wide range of applications.
The grating features a coating of nwr 53-270r-1229-1sp on the front side, enhancing its performance and durability. The physical data of the grating includes a blaze wavelength of 500 nm, 300 grooves, a blaze angle of 4.3 degrees, and an orientation vector of (1, 0, 0). The grating is designed to operate in the first order, and the grating side is the front.
For more detailed information, you can refer to the vendor's website at https://www.newport.com/p/33025FL01-270R. The link is currently valid and indicates that the grating is in stock.