Beam Adapter Kit 105404 includes (1) Alliance Bag and (1) Bag adapter. The adapter fits all Beam Alliance units and connects to the vacuum utility outlet and the front of the machine and the other connected to the main dirt intake. The Alliance bags are made from a high filtration multi-layer synthetic material that lasts 50% longer than standard paper central vacuum bags. We carry central vacuum bags for every Beam model vacuum. If you are unsure which bag will work best for your system then, give us a call today at 1.800.322.2965. One of our experts will be happy to help you find the right vacuum bag for your central vacuum system. Recommendation: Change Beam Bags Every 3 to 4 Months. This kit fits all Beam Alliance central vacuums where the bag can be installed in the dirt pail on the bottom of the machine. This package comes with a bag adapter that connects to the vacuum utility outlet on the front of the machine while the other side connects to the main dirt intake. The bags are made of a high filtration multi-layer material to ensure superior air quality. The Alliance central vacuum bags allow air flow to flow through the bag ensuring full power suction without tearing the bag. It is very important for maintaining your central vacuum to frequently change your central vacuum bags. We recommend changing your Alliance Bags every 3 to 4 months for the best performance from your central vacuum.