Compatible with all FoodCycler™ refillable filter systems, the FoodCycler™ Carbon Refill Packs are intended to replace the carbon in the FoodCycler Refillable Carbon Filters, ensuring an odourless cycle and minimizing unnecessary packaging waste. All components of this item are recyclable. Each pair of carbon packs 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 Sets of Carbon Filters.