General description Reliable material: these airlocks are made of PP plastic, which is odorless and non-toxic. The airlock grommets are made of silicone, soft and safe for long-term use. The airlock kit serves as versatile fermenting equipment for various purposes, such as preserving foods, fermenting cabbage, sauerkraut, grape juice, and making beer, wine, or mead. Technical specifications Material: PP plastic, silicone Colors: White, Black Package includes: 20 Silicone grommets, 6 Plastic airlocks Measurement allowed error: +/- 1-3 cm Installation To keep a good seal, drill a suitable hole on your fermenter lid (following the size of the air valve), then insert the black grommet into the lid hole and place the tapered tip of the airlock into the grommet hole. Usage The airlock kit is designed for various fermentation processes, including preserving foods and fermenting beverages like beer, wine, and mead. Other information