Variable Decade Resistor Box, 0-9999.9 Ohm Range, Black Iron Housing

This variable decade resistance box is designed for educational and laboratory testing applications. It features a black plastic housing and provides an adjustable resistance range from 0 to 9999.9 ohms. 1. Constructed from durable plastic material in a standard black finish. 2. Offers an adjustable resistance span from 0 ohms to 9999.9 ohms for precise circuit adjustments. 3. Measures approximately 16.5 centimeters in length, accommodating standard desk and bench layouts. 4. Includes one resistance box per package, with no additional components or accessories provided. 5. Functions as practical equipment for physics teaching exercises and routine electrical testing procedures.