Iron base, XRF set of 10 discs (7 mm), see BS-XAAS-7MM, BS-2931-7MM, BS-57F-7MM, BS-4932-7MM, BS-4931-7MM, BS-56E-7MM, BS-56G-7MM, BS-64C-7MM, BS-2932-7MM, BS-50D-7MM, BS-50F-7MM