Welcome To Guangzhou Rt Air Filtech Co.,Ltd
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  3. Pre-filter

pre-filter is a filter that captures large particles from the air before they clog your main filter, which is commonly costlier than the pre-filter, and meant to deal with smaller particles. 

Model NO.: P-2
Model NO.: P-4
Model NO.: P-3
Model NO.: P-6
Model NO.: P-5
Model NO.: P-1