Welcome to Giyblacko home themed online mall, improve the quality of life, come to choose beautiful and practical home goods!: Air Lock Bubble Grommet One-way Exhaust Seal Valve With Cork Beer Wine Making Specification Material: Plastic Color: Transparent S-Shape Air Lock Twin Bubble Grommet Homebrew Beer Fermentation Wine Making Application:Pure juice fermentation, such as white wine fermentation, red wine secondary fermentation,preventing back-flush into the fermentation chamber during ambient temperature changes in the room.This style airlock is typically used on fermenters up to 20 Gallon. Usage: Fill water into the exhaust valve, insert to the cover of the brew barrel or rubber plug on the top of the fermentation container, cover with the lid. Function:Isolate the air from the wine/beer, discharge CO2, prevent flies flying into the wine/beer Usage: After sterilized adding water to the exhaust valve . After both sides of the exhaust valve's water in the parallel state, gently insert the brewing bucket lid. When wine was ferment generated bubbles, through the exhaust valve discharged to buckets outside , All the fermentation process is in normal temperature, automatic fermentation , exhaust, without manual control. Can be used for home-brewed beer, wine, cider and other uses. Size: See the picture Note: Please use boiled water to boil and disinfect the Air Lock before you using it. And clean it with water after using. Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon. Package includes: 1x S-Shape Air Lock with snap-on caps Keep Wine Fresh: OWO Wine toppers stopper is 100% leak-proof, which can keep the wine tasting fresh up to 15 days. Easy to Use: Just insert the reusable cork stopper into the bottleneck,then lock with the stainless steel safety clip. High Quality Material: Wine bottle stoppers use food grade stainless steel-SUS304, safe and health. Wildly Used - Perfect for party, wedding, holidays, also a ideal gift for Christmas, Valentine's Day, etc. WARRANTY : We will provide replacement or money back service. If you find any quality problem about our product, please contact us.