Oreck Replacement HYPO Bags PK12MC1000 Fits only models with a bag dock: XL5, XL7, XL21, 2000, 3000, 4000, 7000, 8000, and 9000 series 3 layer, 630 cubic inch capacity with Celoc high filtration system Saniseal automatic closing dust seal to keep dust in bag Easy to install - just insert into bag dock and snap closed