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Solenoid/Electromagnet with Core

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#1850-1 Solenoid/Electromagnet with Core. Used for many demonstrations involving electric magnets or solenoid.  A plastic spool is wrapped with three layers of 20 gauge magnet wire.  Insulated binding posts are located at each end for connection.  Included is a 3/4" x 6" steel core.  Instruction sheet provided.