MJ reference " Magnet for Sale by Swiftpanther | Redbubble
Magnetic Field Meters - List-Magnetik GmbH -
UNIVERSAL REFERENCE MAGNET
Amazon.com: Dowling Magnets Mysterious Magnet Tube with Steel Filings - 3D Magnetic Field Viewer - Magnet Science Kit - Iron Filings and Magnet for Science Experiments - Makes Learning Magnetism Fun! Item SS31
Product A-9653-0143, Reference mark selector magnet for RTLC and RKLC encoder scale installation
Reference Magnet for Gaussmeter Tesla Magnetometer. 1.25kG +/- 2% | eBay
Reference Magnet For Gaussmeter Tesla Meter Magnetometer 2,600 Gauss +/- 2% | eBay