Metal 350Hz NSD Powerball - A spin experience like no other: Almost twice the weight of the Neon or 250Hz models!At almost twice the weight of the Neon or 250Hz models, the 350Hz Metal exerts an extraordinary force on the arm and wrist and will test even the fittest player.Imagine getting the head of a sledgehammer and spinning it in your hand at a modest 5000rpm... you"ll quickly get the idea of what we are talking about here! Flawlessly finished in a magnificent mirror-chrome, this remarkable gyroscope is one of the world"s most perfectly engineeered products. The 350Hz Metal NSD Power®ball is shipped with a silent running but very high density metal composite rotor (such is its mass, even Akis has struggled to exceed 14k).To compliment such a magnificent product, we present it to you in a unique and totally transparent 2-piece magnetic display case which will please the most discerning tastes.