Norpro Black Charcoal Compost Filter Refill Set

Charcoal filters help absorb odors that compost pails produce.Do not wash and reuse the filter. The charcoal in the filter absorbs the odors and once it has fully absorbed to its maximum, discard filter.To replace filter, pull old filter out and toss. Inside replacement pack are two round filters. Only one filter is needed at a time and fits easily and snugly inside the lid.