Feature 1Transistors are basic semiconductor device that control current, which can also be used as a noncontact switch 2There are total 200 pieces of transistors in 10 values in this set which will meet you basic needs 3All transistors are well packed and assorted in a transparent box for convenient storage 4There is a label on box so you can easily identify which type of transistor you need 5This is a great assortment of transistors for electronic professionals or enthusiastsSpecification Features: Transistors are basic semiconductor device that control current, which can also be used as a non-contact switch. There are total 200 pieces of transistors in 10 values in this set which will meet you basic needs. All transistors are well packed and assorted in a transparent box for convenient storage. There is a label on box so you can easily identify which type of transistor you need. This is a greatassortmentof transistors forelectronic professionals or enthusiasts. Specifications: Material: Silicon Package: TO-92 Application: Amplification Type and Qty: BC327 20pcs BC337 20pcs BC517 20pcs BC547 20pcs BC548 20pcs BC549 20pcs BC550 20pcs BC556 20pcs BC557 20pcs BC558 20pcs Package Includes: 1 Box xTransistors Note: Transistors are sorted manually, so there might be small mistakes on type and quantity. Thanks for your understanding. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }