This hose is a replacement for the older 0880-20 where the hose was stored on the outside of the vacuum. And hose connected on the outside of the vacuum. It does not work with the new 0880-20 where the hose connects inside the vacuum lid. This is an older, obsolete style of Milwaukee vac and this part will soon be discontinued as these SKUs age. If you have a new Milwaukee vac (After ~ 2018) this is not your hose. See images of compatible vacuum.