How to Measure the Strength of a Magnet - Aarohi Embedded Systems Pvt. Ltd.
Amazon.com: Dia 1/2x3 inch (12.7mm x 76.2mm) Neodymium Magnet, Super Strong Cylinder Magnet Diametrically Magnetized w/ Poles on the Sides. Made of NdFeB Rare Earth Magnet for Magnetic Pick Up Tools, Crafting