Our Hose and Accessory Adapter Kit allows Milwaukee hoses to connect to the most common vacuum accessory and hose sizes. The kit includes three pieces: 2-1/2in to 1-7/8in Accessory Adapter, 2-1/2in to 2-1/2in-1-7/8in Hose Adapter, and a 1-7/8in to 1-7/8in Hose Adapter. These step adapters allow you to 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.