Air conditioning external filter: In fact, many cars are not, including and , but we developed specifically for high-polluting environment outside the filter, and still no improvement at this point the car in the fan mouth with the Is a black fence, that device can only filter large leaves of impurities and the like, can not filter dust and harmful gases, fans exposed for a long time outside, the fan above the dust inevitably adsorb impurities, once the air is humid, fan blades The above dirt degenerate, moldy, resulting in pungent odor and harmful gases, and now we developed this external filter, is based on the principle of double-filter production of easy to install, simple and effective protection Fan, filter harmful substances in the air to achieve the effect of double-filter, the car become high-quality , air-conditioning fan not often go to the cleaning. High filtration efficiency. High dust holding capacity. Good temperature Resistance. Economical, practical and easy to install.: Item Name: HEPA Air Conditioning Filter,External Filter ,Carbon Cloth Filter Part Nunber: 1658375-00-A,CU47025-2 Fit for Model 3 Y 2021-2023 Colour:As Shown Material:Melt blown composite paper Package Contents: 2 x air conditioner filter 2 x External Filter 2 x Carbon Cloth Filter 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.