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In the past few years, we have covered a whole host of geeky rings here. This mechanical piston ring is designed for engine and car enthusiasts. It is available in Silver 925 and Gold 14k versions. You can roll the top gears to activate the piston.
Ring Size:5 6 7 8 9 10
Country/Region of Manufacture: USA
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Our product is the same as these pictures. If you do not like it when you get, we can give you a refund anytime.
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