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Amazon.com : Hiufer Handmade Diamond Ornate Geometric 3D Band Ring - Gear Spinner Rings Anxiety Stress Relieving Band Rings, Couples Rotating Mechanical Ring (Gold,7) : Sports & Outdoors
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Internal Gear Ring, Gear Planetary Teeth (Outer Diameter: 180mm, Thickness: 20mm, Number of Teeth: 73 Teeth): Amazon.com: Industrial & Scientific
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