From Pumpsolutions

Conventional filters CANNOT remove fractoinal sized particles from oil. The contamination that does the most damage, is so small that it passes straight through most oil filters.
Contamination this small is called silt and it's the stuff that turns oil into liquid sandpaper; causing premature wear, intermittent problems and eventually break-downs.

Magnets don't care what size a particle is, they apply the same magnetic field to anything passing by it and our Neodymium (Rare Earth) magnets, are among the most powerful available. We offer a variety of Magnetic Filtration Products, that are inexpensive, simple andt importantly, highly effective at reducing silt.

Application Possible but not limited to:

Side of spin on oil filters, transmission pans, gas tanks, gas lines, engine oil pans, hydraulic reservoirs, drums, gear-boxes, compressed airlines, propane tanks, propane Lines, liquid hydrogen tanks and lines, bulk oil tanks, or anywhere you want to stop ferrous particulate.

With the use of a velcro strap, zip tie or bungi cord, they can also be applied to non-metallic materials like PVC pipe, copper pipe, hoses, plastic tanks, sprayer lines and more.

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The 3/4" x 3/4" x 3" has Four 1/2" Magnets, Over 13,000 Gauss Rated Material - Green Body. Each magnet has a pull force of over 20 LBS.

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The 1" x 1" x 5" has Five 3/4" Magnets, Over 13,000 Gauss Rated Material - Gold Body. Each magnet has a pull force of over 34 LBS.

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The 1 1/4" x 1 1/4" x 7" has Six 1" Magnets, Over 13,000 Gauss Rated Material - Silver Body. Each magnet has a pull force of over 48 LBS.