Numatic NVM-1CH 604015 HepaFlo Dust Dry Vacuum Bags. These are genuine Numatic Hepa-Flo dust bags, designed for use with Henry family and also the Numatic commercial vacuums. 3 layers of material increases filtration. No dust, no mess, what goes in, stays in. The bags are specially designed to offer the perfect fit, this also means it extends the machines life. These come supplied in a pack of 10 each with a 9L capacity per bag. Compatible with Numatic container sizes, 160, 170, 180, 200, 240, 250 & 300. Easy to match your machine to its Hepa-Flo bag, look for the numatic seal, above the barcode a code will be present, it contains 3 letters and then 3 numbers, the numbers indicate the model container (HVR 240-11), these bags fit as they fit containers 240. Specifications Capacity - 9L Filtration - 3 Layer Hepa-Flo Compatible Container Sizes - 160, 170, 180, 200, 240, 250 & 300 Pack Quantity - 10 Bags