String Wound Filter Cartridge Using 100% food grade Polypropylene (pp) as material, the filter cartridge contains no wetting agents, solvents, antistatic agents or binders; each micron rate has its string pattern to ensure the filtration effect. The filter cartridge has a better dirt holding capability than the general PP sediment Melt blown filter cartridge. Apply to liquid filtration in the fields of petroleum, chemical, electronic, electroplating, medicine and food production. • Filtration precision: 1, 5, 10, 20, 50, 100 micron • Length: 5, 10, 20, 30, 40 inch • Outside diameter: 2.2, 2.37, 2.5, 4.5 inch • Inside diameter: 1.1, 1.19 inch