<ul><li>400 turns of copper wire are wound on former of about 150 mm diameter</li><li>4mm terminals</li><li>The maximum current in the coil is 1A to avoid overheating</li><li>Min & Max distance coils can be a part: 1.75 to 12</li><li>Direction of current is marked on each coil.</li></ul><br><br>A pair of precision coils with 4mm terminals and 400 turns of copper wire are wound on former of about 150 mm diameter. The coil is comprised of a support rod, which fits on the holders of the track system supplied, which enables them to be aligned on a common axis for measurements and study of the magnetic fields. Normally used in pairs, each coil has 4 mm terminals and their distance apart is adjusted over the track supplied. The maximum current in the coil is 1A to avoid overheating. Direction of current is marked on each coil. Min & Max distance coils can be a part: 1.75" to 12" 6.5" tall , 11" Long 6.5" wide

Eisco Labs Helmholtz Coils on Base. 400 Turns of Copper Wire on 150mm Diameter Form