Sometimes simpler is better! Economical magnets in a basic bar shape feature an opposite pole on each end, creating an interesting arc-shaped magnetic field to explore. Ideal for activities that do not require a lot of lifting power. Learn all about magnetic polarity! A great demonstration and experimentation magnet! Each magnet measures 3"L x .50"W x .25"T. For ages 5+. Each pack includes 2 alnico bar magnets with North and South poles stamped. Sold as 2 packs for a total of 4 magnets.