Owners of Littermaid automatic litter boxes have gone out of their way to avoid replacing the waste receptacles. Some have purchased the BAG-it. Some use plastic liners. And some just keep emptying and reusing the existing receptacle. Regardless of how owners avoid replacing the receptacles, their plastic lid eventually becomes unusable. The PERMA-lid is a permanent lid for the waste receptacle. Fabricated from heavy duty acrylic, the PERMA-lid is highly durable and will not fall off the litter box cover. The PERMA-lid can be cleaned easily and it can be removed and reinstalled in minutes without any tools.This product fits all models of Littermaid Litter Boxes using standard Littermaid receptacles.