Set Type: No - These liners are designed for individual use, allowing for easy customization and flexibility in managing your cat's waste. Each liner is crafted to fit seamlessly into your existing cat litter box. High-concerned chemical: None - Ensuring a safe and eco-friendly product, these cat litter box liners are free from harmful chemicals, making them a perfect choice for your pet's hygiene and your peace of mind. and leak-proof, sturdy and high-quality, with automatic closing to keep your hands clean, and a quick lift and tie for easy bag changing. Material: Plastic - Made from and plastic, these liners are designed to hold up against the rigors of daily use. The material is also waterproof, preventing leaks and maintaining cleanliness. Carefully high-quality materials a longer and more worry-free lifespan. With a super strong load-bearing capacity of 20 catties, it hold you firmly.