This champagne bottle stopper fits most standard champagne bottles. It can be used in champagne, and sparkling. The stopper is reusable, just rinse with cold water.Specification:Color: Silver Tone; Material: Stainless Steel, Silicone; Stopper Diameter: 38mm / 1.5inch; Bottom Diameter: 28mm / 1.1inch; Small Stopper Cap Diameter: 17mm / 0.67inch; Height: 55mm / 2.17inch; Pack of 2Pcs Champagne StopperAdvantage:These champagne stoppers are made of stainless steel material, strong and hard, smooth surface. The stopper has silicone on the bottom to provide a better airtight seal to preserve opened champagne bottles.Instruction:Insert the stopper into the neck of the bottle, pressing down on the top slightly so that the clips on both sides catch over the ridge, until strong resistance is felt, indicating an airtight seal.NOTE: They are not suitable for wine bottles, please check size before purchase.