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● Gears Linkage Design, one or more bearings in each gear. Brass Gears + Aluminum Frame + High Quality Bearings. Diameter: about 4in. Thickness: about 1.4in. Weight: about 5.0oz.
● Long Spin Time, 2-4 minutes. Double-layer structure, easy to carry, simple, discrete and fun, also effective for focus and deep thought. Mechanical Fidget Spinner. It spins incredibly well, considering the inertia from all the gearing.