Iron base, XRF set of 16 discs (7 mm), see BS-150-7MM, BS-410A-7MM, BS-90F-7MM, BS-151-7MM, BS-98-7MM, BS-152-7MM, BS-97-7MM, BS-91E-7MM, BS-153-7MM, BS-92B-7MM, BS-93E-7MM, BS-155-7MM, BS-156-7MM, BS-94C-7MM, BS-95A-7MM, BS-96A-7MM