YOU WILL RECIVE 1 BOX OF EACH (24 LINERS IN TOTAL) Specially designed for Cat-it Design SmartSift, these biodegradable replacement liners make managing your cat's litter very convenient. Easy to install, the liners are designed to fit perfectly in the cat pan base./pull out waste bin. They are very effective at preventing waste clumps from sticking to the surface of the base, making cleanups so much easier. When the liner is full, simply remove and discard it. The liners are eco-friendly and will degrade in an organic or regular landfill.