Grounding/Earthing - 54 Hz/72 Hz

Marsoni

M251S

$120.00

Get it in 3 business days with 1 day shipping. Friday, May 29

Grounding/Earthing - 54 Hz/72 HzUsed together, the weighted 54 Hz and 72 Hz tuning forks are a powerful grounding earthing tool that focuses on realigning your brainwave activity. The binaural beat of the forks balance the right and left hemispheres of the brain (entrainment) permitting mindless chatter and the ego to be quieted. They can be used anywhere on the body to assist with relaxation and promote a calming nature. Use these forks when you feel a lack of connectedness, unable

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Definitely better than the old plugs that probably had 80k miles on them. The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine. Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.

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Reviewed in the United States on April 27, 2026

Verified Purchase

Britincali

Lake Worth, US

★★★★★ 5

Upgrade from OEM

After seeing a quite ludicrous $403 quote to change 4 spark plugs in a Mazda3 I decided to show my son how easy it is. These were an upgrade from OEM parts. They were gapped perfectly for the car. They took 20mins to fit and work fine.

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Reviewed in the United States on February 11, 2026