You purchased KLIIN's home compost bin for your everyday kitchen waste? 
Even if one carbon filter is included with your compost bin, you have to replace it from time to time to avoid bad smell. 

• The replacement carbon filters are perfectly adapted to KLIIN's compost bin
• Includes 2 round replacement carbon filters
• Size: diameter of 16cm and thickness of 4mm
• Replace the filter every 3 to 5 months or depending on the use