- $29.99HOJILA Magnetic Polarity Tester Magnet Pole Detector Magnets North and South Poles TesterAmazon
- SAVE $1.70$16.99$18.69Dowling Magnets 2-Inch Alnico Bar Magnets, Set of Two Magnets (Bar Magnets for Science Classroom) with North and South Poles Clearly Marked/Stamped. Learning Magnets. Item 731012.Amazon