Features: Widely used transistors, sufficient, suitable for electronic DIY projects, automotive repair projects, etc. (Optional) Includes 10 types of NPN P-NP power transistors, totaling 200 pieces for varied use. / Includes 15 types of NPN P-NP power transistors, totaling 600 pieces for varied use. Models (Optional)?: (10 types)BC337, BC327, 2N2222, 2N2907, 2N3904, 2N3906, S8050, S8550, A1015, C1815/ (15 types)2N2229N, 4029N, 4029N, 4029N, 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 clear case, well-organized. Features: Material: Semiconductor Material Color: Black and Silver (Optional) Quantity: 1200 pieces (BC337, BC327, 2N2222, 2N2907, 2N3904, 2N3906, S8050, S8550, A1015, C1815)/ 2 600 pieces 2,42N 9, 42N 3, 42N 9 01, 2N5551, A1015, C1815, C945, S8050, S8550, S9012, S9013, S9 014, S9015, S9018 Package weight: 1#60g/2#150g Package size: 1#130*64*22mm/2#170*95*23mm Packing List: 1 * Transistor Assortment Kit