YUKI TRADING Replacement Filter Compatible with PETKIT (Petkit) for Water Dispensers (2nd Generation/3rd Generation), CYBERTAIL [Compatible Models] 〇 Drinking Water Fountain 2 (PETKIT Water Dispenser 2nd Generation) / 〇 Drinking Water Fountain 3 (PETKIT Water Dispenser 3rd Generation) 〇 PETKIT CYBERTAIL [Instructions] 〇 For the first use, remove the filter from the packaging bag and soak it in water for 1 minute each, twice, before use.