Type 'A' vacuum bags are pretty universal in the cleaning industry. These bags are identical to the standard type 'A' bag, except they are HEPA filtered and provide an even better recovery efficiency. If you have allergies or are in the health care industry, you should be buying these HEPA bags. The HEPA rating ensures that 99.97% off all particulate larger than 0.3 microns will be recovered. An average human hair is 100 microns thick. So these bags will filter down to something that is hundreds of times smaller than a human hair.
We carry these bags specifically for our Koblenz U-80 upright vacuum, which is a great fit for commercial facilities. We have a ton of retirement homes and hospitals using the U-80.Each pack of regular bags come packed 3 per bag.
As you can see from the diagram below, a type 'A' bag is filled from the top. A tube runs through the cloth bags to fill the disposable bag from the top for maximum airflow and filling capacity. If your current bags do not hook up like the diagram above displays, you may need a universal F&G vac bag.