Pre Filters RO Systems Replacement Set 

Filter 1:

Polypropylene foam filter cartridge removes sand, rust, silt and other sediments up to 5 Micron 

Filter 2:

Polypropylene foam filter cartridge removes additional contaminants up to 1 Micron

Filter 3:

Activated carbon block 

The carbon is formed in specially pressured, high density blocks to gain high adsorption rate of chlorine, other chemicals and multiparticle organic substances.