The official refill ring for PETKIT's AutoSeal Cat Litter Disposal System. Made with 7-layer EVOH film, it locks odor in and blocks it from escaping while its continuous roll design lets you seal exactly as much waste as you need, whenever you need it. Built to work seamlessly with PETKIT's AutoSeal Cat Litter Disposal System's heat-sealing mechanism, so every seal comes out clean, secure, and odor-free.