Justrite special laminated aluminum/poly liner makes cigarette butt disposal cleaner and easier than ever. Once the burn resistant liner is full, simply use included twist-tie to close and discard. No need to "shake out" nasty butts and ash. Fits any bucket 11-3/4-inches (298mm) wide by 10-inches high maximum size. When used with Justrites Elite or Original styled Smokers Cease Fire smoking receptacles, the system is FM Approved.