Natural Home Compost Bin Replacement Filters (2 Pack), 1.8 gallon, Black Come in a 2-pack and fit all 1.8G compost bins (filter dimensions: 25cm/10x10x.05in) Made of Charcoal Absorbs odors for up to 4-6 months Can be cut to size if too large Specially designed for Natural Home Brands Compost Bins