
The Ceramic Bar Magnets, 50 mm (Pair) by United Scientific are two ceramic bar magnets, each 50 mm long x 10 mm wide x 7 mm thick, supplied unpainted for classroom magnetism activities. Students use them to map field lines with iron filings or compasses, find north and south poles, and show attraction and repulsion between magnets. United Scientific positions its ceramic magnets as an economical choice for physics and physical science labs.