PP water filter can remove sand ,dirt.silt,and rust particals PP water filter can remove sand ,dirt.silt,and rust particalslength 20"OD:115mmID: 28MMPP filter cartridge is made of melted 100%food grade polypropylene.Comparing with PP string filter cartridge,it has better chemical durability and longer service life,diameter:63mm,254mm Item No.DK-20BBPP PP water filter