String wound cartridge filters are manufactured by honeycomb construction with FDA approved polypropylene, bleached cotton or glass fiber wound yarn materials with pp or stainless steel central core, outer layers are loose while inner layers are tight. Wound yarn cartridge filters strengthen the density design provide high flow rate and low pressure drop, improved dirt holding capacity make string wound filter cartridges more effective to meet a variety of industrial processing requirements, such as Pre-RO filtration, Food & Beverage, Chemical Filter Solution, Waste Water Treatment, Petrochemical Process, Electronics & Semiconductor etc.