1. Wine stoppers specially designed for wine pump. The pump works with the stopper to remove the air in the bottle and keep it fresh for longer.2. Suitable for all red wine and white wine. Suitable for all wine bottles3. The vacuum wine stopper is a must for your daily or special dinner wine experience Our wine vacuum-sealed bottle stoppers can provide an impressive gift for friends, family or colleagues, as well as all red wines or lovers on any occasion.4. Just use a real wine pump to insert the universal wine protector vacuum plug into the bottle and pump. Pump until you hear a "click" sound. "Click" means airtight seal5.wine stoppers are specially designed for real wine pumps. These stoppers allow a closed vacuum to maintain the taste and texture of the wine for up to 2 weeks All stoppers are universal and only need to be inserted into the neck of the bottle mouth. The vacuum plug is made of high-quality food-grade rubber and can be used in dishwashers. They are very durable and can be used for many years. The cover on the top of the plug can be removed to aid cleaning.Material:Silica gelcolour:BlackPackage Contents:20 x wine stoppersOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.