Features Good Silicon: Mainly made of premium silicon material, the transistor assortment kit ensures great working performance. Reliable Work: The transistor has low power, high stability, low loss, high sensitivity and excellent reliability as well. With 18 Types: There are diode and triode semiconductors of 18 types, each type has 50pcs, meeting your various work needs. Extensive Use: Widely applied to automotive electronics, network electronics, household electronics, lighting and so on. Easy Carrying: Designed to have a light weight and a compact size, the transistor also has a storage box for easy carrying. Specification: Item Type: Transistor Material: Silicon Package List:900 x Transistor 1 x Plastic Box Package List 900 x Transistor 1 x Plastic Box