Set Of 4 Replacement Charcoal Filters (each set includes 1 round and 1 square).
Double filtration system includes two charcoal filters that absorb odours for up to six months Filters help to neutralize odours inside compost bin.
Replace filters every 4-6 months as needed.
Instructions: Remove old filters from lid. Round filter goes in first. Square filter goes in next. Position in outer ring of lid.
** Compost Bin has been discontinued, only Charcoal Filters are available.