C/o 0.25 m ebert monochromator w/ two 150 u slits, two gratings mtd on interchangeable rotatable holder, manual sine drive, two digital wavelength indicators, instruction manual; 64 x 64 mm ruled area gratings, low blaze 300 nm 2360 grooves/mm, high blaze 600 nm 1180 grooves/mm; 0.3 nm resolution; 3.3 nm dispersion w/ 1180 grating, 1.6nm w/ 2360 grating; f/3.5 aperture ratio; 11.5 in. L, 7.25 in. H, 6.5 in. W
