1、Transistors are basic semiconductor device that control current, which can also be used as a non-contact switch 2、There are total 960 pieces of transistors in 24 values in this set which will meet you basic needs 3、All transistors are well packed and assorted in a transparent box for convenient storage 4、Each transistor is clear marked so you can easily identify which type of transistor you need 5、This is a great assortment of transistors for electronic professionals or enthusiasts Features: Transistors are basic semiconductor device that control current, which can also be used as a non-contact switch. There are total 960 pieces of transistors in 24 values in this set which will meet you basic needs. All transistors are well packed and assorted in a transparent box for convenient storage. Each transistor is clear marked so you can easily identify which type of transistor you need. This is a great assortment of transistors for electronic professionals or enthusiasts. Specifications: Material:  Silicon Application: Amplification Type and Qty: BC327 PNP 40pcs BC337 PNP 40pcs BC517 PNP 40pcs BC547 PNP 40pcs BC548 PNP 40pcs BC549 PNP 40pcs BC550 PNP 40pcs BC556 PNP 40pcs BC557 PNP 40pcs BC558 PNP 40pcs 2N2222 PNP 40pcs 2N3904 PNP 40pcs 2N3906 PNP 40pcs 2N5401 PNP 40pcs 2N5551 PNP 40pcs A1015 PNP 40pcs C1815 PNP 40pcs C945 PNP 40pcs S8050 PNP 40pcs S8550 PNP 40pcs S9012 PNP 40pcs S9013 PNP 40pcs S9014 PNP 40pcs S9015 PNP 40pcs Package Includes: 1 Box x Transistors Note: Transistors are sorted manually, so there might be small mistakes on type and quantity. Thanks for your understanding.