Koblenz BP1400 Backpack Replacement Vacuum Cleaner Bags (OEM# 49-5803-9, 45-0778-6) 10/10 Packs GK-300BP - Koblenz Green Klean® Replacement vacuum bags use the highest quality Micro-Plus filter media. Designed specifically for commercial use, they are always equal to, or exceed OEM quality. Better filtration means cleaner air, less dusting, and longer secondary filter life. Each bag is printed to easily identify the vacuum it fits. Clean with Confidence, Replace with Green Klean.