Compatible with FoodCycler® Eco5/Eco3 refillable filter systems, the FoodCycler® Carbon Refill Packs are intended to replace the carbon in the FoodCycler® Eco5/Eco3 Carbon Filters, ensuring an odourless cycle and minimizing unnecessary packaging waste. All components of this item are recyclable. Each carbon pack will last approximately 3-4 months with regular cycling. The carbon material is an organic compound and completely safe to handle. The FoodCycler® Carbon Filter Refill Packs refill 4 carbon filters.