S-Shape Airlocks Homebrew Bubble Airlock Carboys Stopper & Fermenter Seal Valve with Food Grade Grom

Made of high qualityEasy operation for healthy fermentation foodIsolate the air to prevent oxidation to allow automatic fermentationSuitable for preserving, brewing, making wine, beer, fermenting sauerkraut, Colour:As ShownMaterial:plasticPackage Contents:4 x No. 6 silicone plug4 x One-way valve with cover10 x Black sealOnly 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.