Induction Coils, 3 Pieces, with Different Cross-Sections and Turns

These three acrylic induction coils are designed for experiments in variable magnetic fields, electromagnetic induction and resonant circuits. Each coil is 170 mm long with 4 mm safety-socket connections and 300 turns. The first has taps at 100 and 200 turns and a 50 × 50 mm cross-section; the other cross-sections are 50 × 30 mm and 50 × 20 mm. For extra-low voltage only.