The Milwaukee® Hose and Accessory Adapter Kit allows Milwaukee® hoses to connect to the most common vacuum accessory and hose sizes. The kit includes three pieces - 2-1/2 to 1-7/8 in Accessory Adapter, 2-1/2 to 2-1/2 to 1-7/8 in Hose Adapter and a 1-7/8 to 1-7/8 in Hose Adapter. These step adapters connect different diameter Milwaukee® Vacuum Hoses and Accessories. Each adapter is marked with the diameters it connects between directly on the tool for easy identification. Milwaukee® Hose and Accessory Adapter Kit, 2-1/2 in Inlet, 3 Pieces, For Use With: M18™ FUEL™ 0910-20 6 gal Wet/Dry Vacuum, M18™ FUEL™ 0920-20 9 gal Dual Battery Wet/Dry Vacuum and M18™ FUEL™ 0930-22HD 12 gal Dual Battery Wet/Dry Vacuum Kit, Plastic, Black, 7-1/4 in L