Alfapet Kitty Cat Sta-Put Elastic Sifting Litter Box Liners Jumbo Size 5 Count (3-Pack/Boxes) 5 jumbo size cat pan sifting liners and 1 solid transfer liner per box. Easy to use with quick sifting action. Use with clumping cat litter. Easy to follow instructions are printed on the side of the box. Features the Sta-Put elastic technology to keep the liner in place. The sifting liners measure 36" x 18" x 1 mil and will fit most litter boxes.