Check the listing for details. Standard Metallurgy Slides Reference Sample Kit for Microscope ‒ 23 Specimens. Condition: New, Made in India. Listed at 474.01 USD. This reference sample set is designed for metallurgical, materials science and quality control laboratories. With *23 carefully prepared specimens*, this kit provides a benchmark of common microstructures (like steel, brass, aluminum, cast iron) for comparative use under a metallurgical or materials microscope. Note from seller: Each specimen is inspected for surface flatness and coating integrity prior to packing. If you want comparative photomicrographs or a list of specimen types, message me and I’ll send them before your purchase. metallurgical specimen set, microstructure reference slides, metallography standard samples, Radical 23 reference set, metallurgy kit for microscope, standard microstructure sample set Questions about which specimens included, sample images, o.