2 pcs. Silicone Rubber Plug With Airlock Bubbler Valve Wine BrewOOTDTY Material: Food Grade SiliconeColor: Milk White ColorMode: 03/04/05/06/07/08/09/10/11This silicone plug is different from foam silicone, it is a real food grade silicone, translucent, flexible, temperature resistant from -60°C to 250°C Do not use it in too high temperatureClork 3 can be used from wine bottle and coke bottleClork 5 fits 3L Hydrochloric Acid BottlesClork 10 can be used with purified water buckets (bucket inner diameter 45mm)Clork 11 can be used with purified water buckets (bucket inner diameter 48mm)Hole diameter: 8mm Size: see pictureNo retail package Quantity: 2pcsNote: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Included:2 pcs. x Silicone Stopper Rubber Stopper with Hole Airlock Valve Bubbler Wine Brew