Ideal for classroom experiments and demonstrations, this resistance substitution box enables teachers and students to quickly select from a range of fixed resistor values. It is designed for use in secondary schools and colleges, supporting practical investigations in physics and electronics.

• Includes 12 resistance values: 100O, 220O, 470O, 1KO, 2.2KO, 4.7KO, 10KO, 22KO, 47KO, 100KO, 220KO, 470KO
• All resistors rated at 1 watt with ±1% tolerance
• Sturdy construction suitable for repeated classroom use
• Clearly labelled for easy selection of resistance values
• Suitable for circuit experiments and practical science lessons