Large Ceramic Ring Magnet,Industrial Grade 8 Ferrite Magnets with Hole for Science Experiment-OD100mmxID60mmx15mm

The Best Ceramic Magnets Made under ISO 9001 Quality Systems.Grade 8,which is Stronger than Grade 5. 【SIZE】 The outside diameter is 3.9 inch (100 mm), the internal diameter is 2.36 inch (60 mm), and the thickness is 0.59 inch (15 mm). 【PERFORMANCE】 The ferrite magnet is made by ceramic process. Circle hole magnets are hard and brittle material, have good temperature resistance, anti-corrosion and rust prevention, cheapness and moderate performance. 【BEST PRICE & QUALITY】 Compared to more expensive rare earth or neodymium magnets, these circle donut magnets offer much better value for all your magnetic project needs.Great ring magnets for You DIY Projects! 【WARNING】The ferrite ring magnets is very fragile, it is forbidden to collide with other metal objects (including another magnet), so be careful when you are trying separate them!