Compatible with Crystal Litter Trays Refill: These litter box liners are specifically designed to perfectly fit automatic cat litter boxes and compatible with Pet Crystal Pro. Measuring 37"x17" (94 cm x 43 cm), these litter bags are a better fit and hold 16 to 20 gallons, making disposal easier and more efficient Anti-Scratch Cardboard: Each litter box liner contains thick cardboard to protect the cat litter bag from sharp claws, scoops or self-cleaning rakes, prevent the litter bag from breaking and avoid leaks. Make your cleaning easier every time Sturdy Litter Bags: These litter box liners are made of tough HDPE material with a strong seal to lock in odors. They are heavy duty, tear-resistant, scratch-resistant and waterproof. No more leaks, keeping the litter box cleaner and making litter changes easier too 20 Count: This package includes 20 litter liners and 20 hard cardboards. Built to control odors and block litter scatter, these replacements make cleanup quick and mess-free. Enjoy hassle-free cleanup and a purr-fectly clean space for you and your furry friend Save Money and Time: Use our litter box liner and hard cardboard combo instead of replacing your entire tray. You can extend the tray's lifespan and save your money by only replacing the liner and cardboard, not the entire tray Drawstring Closure Design: Our cat litter box bags feature a thick built-in drawstring closure design that simplifies sealing and disposal. Simply pull the drawstring to securely contain litter and odors without needing knots Customer Service: Any defective litter box bag or cardboard, please message us without hesitation, and we will offer you a suitable solution in 24 hours. Please feel comfortable to reach out if you have any questions Note: This package only includes litter bags and cardboard, not an automatic cat litter box or tray. The litter box and tray shown in the images are for illustration purposes only to demonstrate their compatibility with the bags. Please confirm the product details before placing your order These litter bags are specially designed to fit automatic cat litter boxes, including compatibility with the Pet Crystal Pro. Measuring 37"x17" (94 cm x 43 cm), they offer a precise fit and hold 16-20 gallons of waste for effortless, mess-free disposal. Each bag features dual-layer protection: a thick anti-scratch cardboard insert shields against claws, scoops, or self-cleaning rakes to prevent tears and leaks, while the outer layer is crafted from heavy-duty HDPE material—tear-resistant, waterproof. The built-in drawstring closure allows quick, knot-free sealing to contain waste and smells instantly. Designed for cost-effective maintenance, this 20-pack (including 20 liners + 20 cardboard inserts) lets you replace only the liner and cardboard instead of the entire tray, extending your litter box’s lifespan and saving money. Engineered to streamline cleanup, these durable liners ensure a cleaner environment, minimize odors, and deliver hassle-free hygiene for both you and your feline companion.