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The industry has always looked to HSI to do things with reed switches that no one else can do. As an industry leader, we make the world’s smallest Form A switch, the world’s smallest Form C switch, the only switches with solid tungsten contacts, high voltage switches, RF switches, pressurized switches, and now the only true Form B switch. Even with over 1500+ products to choose from, all HSI products can be modified to your specifications.

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