Catit Replacement Liner for Smartsift Base. Specially designed for Catit Design SmartSift, these 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. 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. Specially designed for Catit SmartSift cat pan base For easy and convenient waste management Prevents waste clumps from sticking to the cat pan base Unscented 12 liners per pack