Elenco Transistor Kit - 100-Piece - TRAK-100 100 piece transistor kit Insure that you will have the transistor you need for that project Assortment of 15 types of transistors including NPN, PNP, FETs, Darlington and Power transistors Packed in a cardboard organizer box Another fun, educational product from Elenco, the company that brings you Snap Circuits