Used to connect vacuums main part and flexible vacuum brush or nozzle You can cut and use 3 specifications and sizes according to your own requirements You can try to combine this adapter together another adapters to have more options With this adapter, you can use the European version of the floor brush and other nozzles Adapter for Power Tools: This adapter is a bridge between your vacuum and power tools! Adapter with 5 layers is compatible-with many vac-hoses Made from rubber, for use.Easy to install and use