KEEP WINE FRESH: Creat an air-tight seal to preserve opened bottles of wine. Fits most regular red and white wine bottles with diameter 18-19mm. AND : Red Wine Stopper shell is made of smooth hard plastic,The internal seal of it is made of food grade silicone, easy to clean and safe to reuse. TWIST TO SEAL: Turn the top counterclockwise to loosen, clockwise to tighten. Easy to lock and remove from the wine bottle. EASY STORAGE: Suitable for the limited space,can lay the bottle flat. -such as fridge, traveling, outdoors and RV. Material: ABS+silica gel colour: Black Package Contents: 4 x Champagne wine stoppers 4 x red wine wine stopper Only 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.