Filter replacement Wc Wc Cats # 40355 Hooded Cat Maro and flap is particularly ideal for large cats. The charcoal filter neutralizes odors. The strips / incorporating locks and ensures easier opening and closing. Details: .con hood, filter, and loop flap .filtro charcoal neutralizes odors .evita dispersion of excrement and urine .r?pido to open and close with additional clips to clean .Easy General Information: Cats by nature are very hygienic, but no domesticated animal is born. In order to make training easier kittens should be a litter tray available in various rooms in the house. As soon as the cat is used to using the tray, the amount may be lower. Generally speaking, there should be as many trays as cats are in the house. Litter trays should never be placed near the feeding place of the cat.