Soft Magnetic Iron Rod is 5-mm in diameter and 200 mm long (about 9 inches). It may be used in experiments related to electromagnets, transformers, solenoids, and inductors (coil, choke, or reactor). Soft iron = Low coercivity iron = Low resistance to being demagnetized For uses involving changing magnetic flux in electromagnets, electric motors, generators and transformers. Dimensions: (D x L): 5 mm x 200 mm. Bulk Discount: Quantities of 10 and more are subject to the bulk order discounts.