This is a genuine Numatic case that costs more than "quality replacement" cases - but they are better quality and seal better than cheaper counterparts (Numatic cases are all plastic - no cardboard and they have a plastic tab that flips up and prevents dust from entering the bag when removed (the cheaper ones, others don't have this feature). They also last longer and don't fall apart. My only complaint was that Revane said they would hand them directly to the resident upon delivery. Concrete dog statues on my doorstep don't count as "residents," okay?