The DH2H1 is one of our newest additions featuring a true 0.200" (+/-0.004") diameter. It is also quite unique in that its thickness is a true 0.100" (+/-0.004"). These small magnets are in high demand since they are perfectly suited for use in today's ever-shrinking electronics, sensors and various medical devices. They are also great for hobbies, crafts, science experiments and so much more!