Home Gift Ideas Mechanical Piston Ring

Mechanical Piston Ring

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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.

These rings are available for sale on Etsy. Not super expensive either.

[where to find it]

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