Features: Comprehensive transistors set featuring 24 popular models including 9014 and 5551, providing broad coverage for diverse electronic needs with high value and reliability. Includes 480 pieces total in a 24 compartment storage box for organized access, preventing loss and mixing, with precise parameters like amplification and voltages ratings for stable performances. Ideal for electronics beginners learning basics, experienced hobbyists creating projects, and professional in repair shops or educational workshops. Perfect for electronic making, maintenance repairs, hands on training, and workshop inventory management in various settings. Enhances efficiency and reduces failure risks with quality semiconductor materials, ensuring dependable operations in all transistors based applications. Specifications: Component: Semiconductor Materials Color: Black Weight: 167g Size: Approx. 3.93x5.90inch(10x15cm) Package Includes: 1 Box transistors Box Set note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.