Set allows bottles to be properly resealed to preserve any unfinished wine by vacuuming air from the bottle. 4-Piece set includes wine bottle vacuum pump, two stoppers and waiter corkscrew. Vacuum wine pump has stainless steel barrel and curved handle for grip comfort, airtight rubber stoppers have plastic tab for pressure release and corkscrew is stainless steel. Works well with white or red wine. All parts nestled neatly in storage case. All FDA compliant.