Demountable-Transformer-Kit-RVFM-231-021-Laminated-low-loss-core-for-attaching-different-coils-to-demonstrate-the-step-up-&-step-down-transformer-principle-Attractive-demountable-transformer-with-clearly-labelled-coils-for-GCSE-physics-&-science-&-A-Level-physics-demonstrations-The-principles-used-show-how-transformers-are-used-in-domestic-electrical-appliances-&-in-the-National-Grid-for-power-transmission-This-magnetic-circuit-is-made-up-of-highly-permeable-U-shaped-metal-sheeting