... : PP 3: Length: 10, 20,30,40inch Product Description The filter cartridge has the characteristics of excellent chemical compatibility, high flow ... . Consistent filtration over the life of the cartridges Specification:1. Filter Media: polypropylene2. Outside diameter: 69mm3. Inner diameter: 28mm4. Length:10 ... ",20",30",40"5. Filter fineness: 0.08~0.1/0.22/0.45/0.5/0 ...