Package information: Bottle stoppers are included in sufficient quantity for everyday use and replacement needs. These resealable wine pump vacuum stoppers are designed to be used with wine vacuum pumps (pumps not included) and help remove air from bottles to preserve wine. Applicable occasions: These reusable wine saver vacuum stoppers are suitable for home use, restaurants, hotels, cafes, and other commercial settings. The included quantity meets typical usage demands. Easy to use: Insert the wine stopper into the bottle neck and use a compatible vacuum pump to remove air until a click is heard, indicating a secure seal. This simple process helps save time and maintains wine freshness. Strong adaptability: These black vacuum wine stoppers are standard size and fit most wine bottles, including red and white wine. They provide reliable performance without compatibility concerns. Color: Black Material: Silicone Size: 4.2 x 3.3 cm Package Contents: 24 x Wine Stoppers Note: The actual color may vary slightly due to different screen displays. Measurement may vary by 1-3 cm.