About product and suppliers:
            2 pre filter products are offered for sale by suppliers on Alibaba.com, of which water filters accounts for 131,850%, air filter accounts for 15,000%, and air purifier parts accounts for 500%. 

A wide variety of pre filter options are available to you, such as panel filter, cartridge filter, and wire mesh. You can also choose from pre filter, hepa filter, and ulpa filter pre filter, as well as from synthetic fiber, active carbon, and fiberglass pre filter

There are 4,325 suppliers who sells pre filter on Alibaba.com, mainly located in Asia. The top countries of suppliers are United States, China, from which the percentage of pre filter supply is 1%, 99% respectively.