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
MAG-MATE NE5050NP35 11.2 lbs. Average Pull Force Cylindrical Magnet | Travers Tool
Round Magnets - Cylinder, Horizontal Magnetic Poles | MISUMI | MISUMI