Double Concave Optical round Lens, Material: Glass, designed for physics and educational uses, Because of their educational use design, there may be minor imperfections that do not affect physical function, Size: 250mm focal length, 50mm diameter and 3mm thick
Quantum Levitation Classroom Kit, The Classroom Kit will allow students to experiment with classical & modern physics. Kit includes: Round maglev track(Dia.15.7in) 3 handheld magnetic device. 1 medium levitator 1 small levitator 3 small Ed levitators