Material: This wine stopper is made of high-quality plastic and silicone, durable, sturdy, and fashionable. It will not be affected by the acidity and alkalinity of red wine, nor will it rust. Specification: mainly suitable for bottle necks with a diameter of 0.6-0.79 inches or 15-20 millimeters. The size of the wine bottle cap is approximately 4.3 x 1.7 x 0.83 inches (11 x 4.3 x 2.1 centimeters). Each package contains 3 wine caps, which are sufficient for daily use. Sealing: The bottle cap has good sealing performance, which is very suitable for preventing air leakage and keeping wine, champagne, and other soft drinks cool. Easy to use: Easy to insert and remove from the bottle, just push the bottle cap into the bottleneck. High quality bar, kitchen, and refrigerator supplies. Application: Smooth edges, suitable for various red wines, champagne, and wines to maintain their freshness.