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Transistor Set, Power Transistor Assortment, 200 Pieces Transistors Assortment, PNP Transistor, Transistors BC327-BC558 for DIY Repair Devices and Electrical Appliances, Default sound you can crank down onTransistor Set, Power Transistor Assortment, 200 Pieces Transistors Assortment, PNP Transistor, Transistors BC327 BC558 for DIY Repair Devices and Electrical Appliances, Default Product Features Function: transistors are basic semiconductor devices that control the current and can also be used as a non contact switch Application This transistor assortment kit is widely used in product development, student experiments, maintenance, production, etc.