Features: 6 gear Adjustable Resistor Box delivers exact resistance values up to 99999.9 Ohms, ensuring laboratory grade accuracy for physics electricity experiment and electronic circuit testing. Features six gear adjustable resistance setting with plastic housing, enabling quick adjustment for various electrical measurement tasks in educational or research environment. Sutiable for students, teacher, educators requiring multifunctional physics teaching aid lab electricity equipment for hands on circuit analysis and practical STEM learning application. Widely used for classroom teaching demonstrations, university laboratory, or electronics project requiring precisely variable resistance control in circuits, sensors, and calibration tool. Engineered with professional electronic components, this educational resistance box variable resistor meets rigorous academic standards for repeated use in physics experiments and electrical engineering prototyping. Specifications: Color: Black Component: Plastic Size: Approx. 138x178x93mm/5.43x7.01x3.66in Weight: Approx. 481g Package Includes: 1Piece Adjustable Resistance Box note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color