Usually, theory raises more questions, and provides no finite answer to technical professionals. That's why Magnetic Shield Corporation's engineering team has developed practical methods of evaluating performance. Global businesses, engineers, scientists, inventors, and educators in over 80 countries have used our Evaluation Lab Kits and proprietary shielding materials for hands-on evaluation. As a leading expert since 1941, Magnetic Shield Corporation has developed thousands of technical solutions, supplied millions of fabricated shields, and developed proprietary shielding materials.