RESISTANCE BOX, PLUG TYPE (0385) For accurate work. In well polished wooden box with bakelite panel figured in white. Split brass contact blocks hold precision cut, interchangeable brass plugs having moulded black bakelite fluted tops. Coils of constantan wire, non-inductively wound, double silk covered; with resistances precisely adjusted and are mounted underneath the panel with double nut arrangement. Accuracy ?O.1%. Qty :