Catit Design SmartSift Replacement Liner for Cat Pan Base 50541 Features: -Catit collection. -Biodegradable replacement liners. -Specially designed for Catit SmartSift cat pan base. -Unscented. -For easy and convenient waste management. -Prevents waste clumps from sticking to the cat pan base. Dimensions: Overall Height - Top to Bottom: -18.5". Overall Width - Side to Side: -9.8". Overall Depth - Front to Back: -15". Overall Product Weight: -0.7 lbs.