Features: Widely used transistors, sufficient quantity, suitable for electronic DIY projects, automotive repair projects, etc. (Optional) Includes 10 types of NPN PNP power transistors, a total of 200 pieces for varied use. / Includes 15 types of NPN PNP power transistors, a total of 600 pieces for different uses. Models (optional): (10 types) BC337, BC327, 2N2222, 2N2907, 2N3904, 2N3906, S8050, S8550, A1015, C1815 / (15 types) 2N2222, 2N2907, 2N3904, 2N3906, 2N5401, 2N5551, A1015, C1815, C945, S8050, S8550, S9012, S9013, S9014, S9015, S9018 Quality transistors have high dielectric strength, fast switching speed for electrical signals, low power consumption, and good current performance. Each is stored in a matching transparent case, well organized. Features: Material: Semiconductor material Color: Black and Silver (Optional) Quantity: 1#200 pieces (BC337, BC327, 2N2222, 2N2907, 2N3904, 2N3906, S8050, S8550, A1015, C1815)/ 2#600 pieces (2N2222, 2N2907, 2N3904, 2N3906, 2N5401, 2N5551, A1015, C1815, C945, S8050, S8550, S9012, S9013, S9014, S9015, S9018) Package weight: 1#60g/2#150g Package size: 1#130*64*22mm/2#170*95*23mm Packing list: 1 * Transistor assortment kit