Assorted Ceramic (Ferrite) Ring & Disc Magnets, 200 Ring Magnets Size 3/4" OD x 1/4" ID x 1/4" Thick & 300 Powerful Disc Magnets Size 3/4" Diameter x 3/16" Thick, In Counter Display, Perfect For Use In The Home, Office, School & Shop, Great For Craft & Hobby Projects.