Features:Transistor and diodes are basic semiconductor devices that control or rectify current.There are total 400 transistors and diodes in 24 values in this set which will meet you basic needs.All transistors and diodes are well packed and assorted in a transparent box for convenient storage.Each transistors and diode is clear marked so you can easily identify which type you need.This is a great assortment of transistors and diodes for electronic professionals or enthusiasts.Specifications:Type & QTY:2N222225pcs2N390425pcs2N390625pcs2N555125pcs2N540125pcsA101525pcsSS805025pcsSS855025pcs1N400120pcs1N400420pcs1N400720 pcs1N539220pcs1N539920pcsRL20115pcsRL20715pcs1N54015pcs1N50045pcs1N54085pc1N581910pcsSR26010pcsSR3605pcsFR10410pcsFR10710pcsFR15710pcsOperating Temperature: -55 to +150Package Includes:1 Box x Transistors and DiodesNote:Transistors and diodesare sorted manually, so there might be small mistakes on type and quantity. Thanks for your understanding.