9 ELECTRICAL MEASURING INSTRUMENTS-NAMELY, MULTIMETERS, RESISTANCE MEASURING INSTRUMENTS, CONTINUITY TESTERS, INSULATION TESTERS, (( LINE CONNECTION TESTERS, )) IMPEDANCE MEASURING INSTRUMENTS,[ WHEATSTONE BRIDGE TESTERS, CROSBY BRIDGE TESTERS, DISCONNEXION BRIDGE TESTERS, ] VOLTAGE TESTERS, CASES AND LEADS FOR ALL OF THE ABOVE, AND PARTS THEREFOR