SOLD OUT...No Longer Available! This new improved cover for the dust cup, now has a relief valve enclosed in the lid. Fits all models of Hoover Air produced since 2011. New relief valve lets air go directly to the motor if hose plugs or filter is fouled. This valve prevents motor overheating and produces a raspy whistle sound when it engages. Carry handle is also built into this cover. Models UH40700 and UH40705. 11/22/21 dda