Product Details Size: Air Pump: 8.3*7*14.5cm/3.3*2.8*5.7 inches Plug: 3.5*1, 8*4 cm/1.4*0.7*1.6 inches Material: Stainless Steel + Silicone Package Includes: 1 Wine Air Pump + 4 Bottle Caps (All Reusable) Keep Flavor for 10 Days: The vacuum pump creates a vacuum that stores and protects the wine. It prevents bacteria and oxidation processes and gives the wine a natural, fresh smell and taste that lasts up to 10 days after opening the bottle. 2 Extra Accessories. The set includes 1 high-quality wine storage vacuum pump, 4 reusable caps. The wine aerator speeds up the bubbling process faster than ever before, producing smooth, delicious wine in just minutes. Safe Food Grade Material: The wine stopper has a built-in vacuum value and is made of ABS and food-grade silicone. Easy to clean and leak-proof. Hand washing is recommended.