The inside of the oil filter forms a strong high-temperature resistant permanent magnetic field:the engine will inevitably produce metal powder during high-temperature and high-speed movement.The hardness of the iron powder is very high.If it follows the oil circulation,it will enter the engine and the engine wear will be aggravated.Germany's For BMW is the first car manufacturer to use magnetic technology to remove oil and iron powder. Adsorption force:Niobium alloy magnetic steel,the production of strong magnetic field firmly adsorbs the small iron filings generated by the engine,no longer return to the engine Extend engine life:The oil filtered by the filter magnet has less impurities,smoother and reduces frictional resistance.The engine runs quieter and smoother Purification oil:iron particles and harmful solid substances in the oil are adsorbed in the oil filter,even if the maintenance time is exceeded,the oil is still smooth and smooth. Reduce consumption More environmentally friendly:90% of the engine is reduced in wear and the wear is reduced by more than 3 times.While maintaining power,it also contributes to environmental protection. color:blue Material:high temperature resistant environmentally friendly silicone Product length:23cm Package Contents: 3 x Magnetizer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.