Creative Hobbies Ceramic Industrial Magnets -11/16 Inch (.709) Round Disc - 3/16" THICK (.198" or 5mm) - Ferrite Magnets Bulk for Crafts, Science&hobbies - Grade 5-100 pcs/box! Creative Hobbies Grade 5 Ceramic Disc Magnets are strong and measure 11/16 Inch (.709" or 18mm) Round x 3/16" (.198" or 5mm) Thick (50% Thicker than competitors). BEST SELLER - Great for all home, office, craft, hobby, science projects and product manufacturing applications. HIGHEST QUALITY - Flat Disc Magnets with Beveled Edges to protect surfaces from scratching like other inferior brands do. NORTH POLE MARKED so you can apply the magnet easily to the correct side. WE ARE A USA OWNED AND BASED SELLER!! COMPARE! Not a toy, for craft, science or production use only.