Diffraction Grating 30 mm

Tis item is a used Milton Roy 35-33-09-351 Diffraction Grating in good condition. The corners of this piece are damaged. Specifications: – Grooves per mm: 600 – Blaze: 800 nm – Blaze Angle: 13.9 degrees – Coating: Gold – Size: 25 x 25 x 6 mm.