Water filter replacement activated carbon filter cartridge is the second filter cartridge of 3-stage drinking water filter replacements, it is a type of slim carbon block filter with threaded or double O-ring end caps, varies of sizes and end caps available.
PP Pleated filter cartridge is made of PP membrane, supported and held by inner and outer cages, with absolute micron rates from 0.1 to 20 microns, usually for industrial, brewery and pharmaceutical processing filter systems
Jumbo carbon block filter cartridge we usually see at POE end like basement and commercial water filters, to filter out chlorine for general use of a house. The sizes are usually 4.5"x10" and 4.5"x20", material options are NSF certified coconut carbon.
PP series melt blown filter cartridge is conventional melt blown filter cartridges with various of size options for water treatment, water filter and industrial sediment filter purposes. Material is polypropylene.
Big blue melt blown filter cartridges refers to 4.5" outer diameter melt blown filters, usually work as sediment filter for POE water treatment systems. The bigger outer diameter allows multi-rates design layered from outside to inside of the cartridge.