This fits your .

"*1 Set of replacement filters for a KYK 25000/ KYK Generation II Water Ionizer *Using an enhanced 2-step filtration system with large capacity, quality filters. *Each filter is certified for safety and functionality with the use of FDA/NSF certified materials. <1st Filter> Specs: - Antibiotic one-side filter - Zeomic - Active Carbon (with silver added) - Sediment Filter The first filter removes all foreign substances and chlorine. It also features enriched antibacterial performance. <2nd Filter> Specs: - Antibiotice one-side filter - Granular Actived Carbon - Active Carbon (with silver added) The second filter has enriched purifying and antibacterial performance. It uses silver impregnated activated carbon of high quality, activated carbon and an anti-microbial agent." INSTRUCTIONS:"*These replacement filters are made specifically for KYK Water Ionizers. *These filters do not work in other manufactures models such as Special K1, EOS Hi-Tech Co, Lydia, Genesis Platinum by EOS, Tyent, Chanson, Life, Kangen Water Ionizer, Enagic Water Ionizer, etc. *If not sure of your specific model, we highly recommend you check the manufactures label that is on the back side or bottom of your machine prior to ordering as we cannot be held responsible for ordering the wrong filters. " •Size: 82mm * 255mm •Weight: 520g •Shipping Weight: 720g
This filter is compatible with a ionizer opened BACKSIDE to change the filter.  If your machine is open front type to make a replacement, Our KYK filter doesn't fit to your Ionizer.
1st filter Capacity : 4000L
2nd filter Capacity : 6000L

Ionpolis Genesis Genesis7 Generation2 Lydia KYK Series Water Ionizer Replacement Filter 1st and 2nd Set for KYK 25000/Generation II - B01IDGZI2M