【Drawstring-Closure Design】Our automatic cat litter box bags have convenient drawstring closures that prevent the litter from exposing, and the smell overflows. It saves you both time and effort while leaving your litter box much cleaner. Perfect for the busy household of cat lovers. 【21 Litter Box Liners】 There are 7 in a package, 6pcs With Filter Holes, 1pcs Without Filter Holes. Contains 7count packs of 3, total of 21 liners. The cat litter is changed at least once a week.suitable for cat lovers with multiple cats at home, or pet hospitals, pet stores. 【Large Cat Litter Bags】 Size: 37 inch * 18 inch. These linings are large enough or oversized bins to make cleaning the litter box much easier. Suitable for most trash cans. Cat litter bags will keep kitty litter in your litter box liners and off your floors, no spilling or breaking or mess. 【Strong Material】 It is made of extra thick material, which is not easy to tear and waterproof. The smooth surface is strong enough to withstand cute kitten paws.We are committed to solving your difficulty in selecting cat litter box liners. 【Easy to Use】Put all the cat litter bags on the litter box and throw out one each time you change them. Each of our liners is self-contained, you don't need to tear at the seams when you open it, just pull it out easily. Be sure to select the correct size that corresponds with your litterbox. Each filter has 76 filter holes with a diameter of 1.1 cm. Sifting Cat Litter Box Liners