https://www.hydrodex.com/difference-pleated-string-wound-melt-blown-filter-cartridges/
Pleated, String Wound and Melt Blown Filter Cartridges | Hydrodex
Difference between Pleated, String Wound and Melt Blown Filter Cartridges? Each type of filter cartridges are acceptable for pretreatment to Reverse Osmosis
melt blown filter cartridgesstring woundpleated