U-Shape-Electromagnet-RVFM-P05007-p-This-value-for-money-U-shaped-electromagnet-can-be-combined-with-a-set-of-spring-scales-to-measure-the-relationship-between-input-voltage-&-force-The-electromagnet-consists-of-2-large-copper-wound-bobbins-situated-round-a-large-U-shaped-iron-core-p-RVFM-U-Shape-Electromagnet-120mm-Length-Including-Hanging-Hook