Check the listing for details. Large 3.025"Diameter Ceramic Hard Ferrite Disk Disc Magnet Strong 2-Pack Grade 8. Color: Dark Gray, Condition: New. Listed at 18.21 USD. Ceramic 8 Hard Ferrite Magnet - 3.025" Diameter x 0.350 Thick, 2-Pack. This strong magnet can be used for a multitude of purposes: crafts, industrial, holding, magnetic assemblies, only limited by your imagination. All magnets are fragile so don't let these two magnets snap together. Please keep in mind, this material is very brittle and will most likely have small chips...all hard ferrite magnets are this way. Each magnet has ~12-lbs pull strength. Ceramic Magnets or Hard Ferrite Magnets Strongest Ceramic Magnet available Crafts - Industrial - Magnetic Assemblies - Holding - Therapy Disk, 3.025" Diameter x 0.350" Thick Approx ~12-lbs pull strength. AZ Industries, Inc. has been in business for over 50 years.