Air Core Solenoid 102 Macalaster Scientific Corp Watertown MA USA Never been used. Very good condition for its age. These are free of chips or cracks. Clear vivid color, but due to age they may have some imperfections. Box has storage wear. Air Core Solenoid helps investigate the magnetic field of a long coil. It can also used with the Current Balance as an accessory to measure the force on a conductor in a magnetic field. The solenoid has coils wound on a plastic tube with approximately 575 turns of copper wire. Vintage Item. Please look at our pictures. 1 Piece Total 1 Solenoid approx. 6.5" Ready to ship now. Tracking number and insured shipping. Most orders go out same day. We recycle packing material. Thank you for looking