5 Replacement Carbon Filters 4 "Good price but a bit thin" Rosalind 17 February 2020 These are cheaper than many others I've found as the pack contains 5 filters. However, the filters are thin and my original Lakeland compost filter (came with metal "waste bin" style) was about 8mm thick and much more effective. These tend to drop out of the lid. So I use them doubled up and they stay in place better. Nobody seems to sell the thicker kind any longer.