... 2,400pcs Qty/40' HQ: 2,580pcs Home used water filter: 5 stages purification: 1) 1st stage: PP or ceramic ... carbon cartridge5) 5th stage: post carbon cartridge Features: The undersink filter system applies to family, under the counter unit.It is ... very easy to install.Excluding water filter elements such as water filter cartridge,water filter housing,household reverse osmosis system,membrane&housing ...