Pack of 80, premium quality magnetic circles. Anisotropic. Each circle measures 0.75" in diameter and is 0.06" thick. Backside of circles features a heavy duty, double coated rubber 3mil adhesive for a strong, lasting hold. Easy to use- just peel circles from slab and adhere to any flat, nonporous surface. Four circles have a magnetic pull of 2.1lbs. Packaged as four magnetic sheets, with 20 circles each. Convenient, versatile tool for crafts, school projects, kitchen, bathrooms, garages, and for organization and storage purposes.