This is a 33066FL01-300H Reflective Grating from MKS/Newport, a leading vendor in the optical industry. The grating, which is rectangular in shape, measures 12.5 x 25 x 6 mm and is made of soda lime ru clear float glass. It is designed to work with a wavelength of 588 nm.
The grating features a nwr 83-300h-5235-1sp coating on the front side, enhancing its performance and durability. The grating has 1800 grooves per millimeter, and the blaze wavelength is 250 nm. The orientation vector is (1, 0, 0), and the order is 1.
The item's physical data indicates that it is a front grating, and the grooves are oriented in the x-direction. The grating is in stock and available for immediate purchase at the provided weblink, which has been verified and is currently valid.