The Eon top is Rich's latest one piece build, and with it he was attempting to make the longest spinner possible from a simple build, with just 3 metal combinations, SS, Brass and Copper, and at a low price point. He had a contest to see if anyone could achieve a 25 minute spin with the copper Eon, a previously unheard of time for a one piece top that doesn't involve tungsten, and it was achieved by one collector, really an amazing feat! I myself was able to get 22+ minutes out of the copper Eon, and it was really fun going for the gusto with this one. It's soooo easy to spin, and sooo smooth. Really an enjoyable top, especially for how inexpensive it is! The Eon is 1.49" in diameter.