1-1000Ω Plug-Type Brass Resistance Box, 13 Coils

This plug-type resistance box is housed in a molded enclosure fitted with split brass contact blocks that accept precision-cut, interchangeable plugs with molded black fluted tops. The resistance coils are wound from double silk-covered constantan wire, providing stable resistance values with minimal temperature dependence. The box contains 13 coils spanning a range of 1 to 1000 ohms, with a combined total resistance of 2110 ohms. Accuracy is ±0.1%, and ohm values are clearly marked on the panel for quick selection. Designed for precise electrical measurements and circuit experiments in physics laboratories.