... . membrane pleated filter cartridge media: polypropylene; 2. micron filter cartridge length: 5'',10'',20'',30'',40'' 1. pleated filter cartridge ... , 100um....;2. micron filter cartridge length : 5'', 10'', 20'', 30'', 40'';3. membrane pleated filter cartridge media: polypropylene;4 ... ourside diameter: 69mm;6. inner diameter: 28mm;7. membrane filtration features: a. 100% pure polypropylene construction; ...