Granulated Activated Carbon Filter Cartridge for Residential, Commercial, Industrial Use Specification : Filtration : Nominal Rating. Micron Rating : 5um Length :10" (Most Common for Residential) , 20" (Most Common For Commercial) ID (Inner Diameter) : 28mm OD (Outer Diameter) : 65mm Material : Activated Carbon Coconut Shell Iodine 1000 and Up Standard Products Equivalent : DEWater PP Indonesian Top Brand Packaging : Wrapped with POF Plastic Material. 10" : 50pcs/Carton 20", 30", 40" : 25pcs/Carton Container 20GP / 40GP / 40HQ Ordering Code : GAC-AAXXXX AA : Inch XX : Iodine Number 800/1000