This INAX JF-K20-A cartridge is an eco-type with a replacement目安 of 5 months and supports 20L/day usage per cartridge. - Brand: INAX - Model: JF-K20-A - Type: Eco-friendly water purifier cartridge - Compatible products: AF-6, AF-8, RF-7, RF-8, RF-9 - Replacement目安: 5 months - Water usage: 20L/day - Quantity: 1 cartridge Thank you for viewing. I have a LIXIL subscription, but I don't use it much because I'm using another water purifier, so I have a lot of these and am selling them. Regular price: 7,150 yen per cartridge