Introducing the Aphyxen Stainless Steel Enclosed Cat Litter Box. Made with high-quality, sturdy stainless steel, this litter box is not only odor-resistant and easy to clean, but it also has a long service life of five years or more. It’s easy to assemble. The no-tip design offers multiple entrances plus a filter pedal for easy entry and exit. The large capacity makes it suitable for cats weighing 1–30 pounds. Plus, just one refill can last your cat up to 30 days—making it perfect for busy pet parents.