Reliable material: airlocks are made of pp plastic, odorless and non-toxic, grommets are made of silicone, durable and soft, safe for your use, can serve for a long time Keep a good seal: easy to use, just drill a suitable plug on your fermenter lid (follow the air valve size), then insert the black grommet into the hole of the lid, put the sharp tip of the airlock into the grommet hole to make a seal Convenient to clean: easy to clean with practical design, the airlock can be disassembled, just use a small brush to clean it completely, it can soak in bleach to disinfect Main function: the versatile fermentation equipment airlock kit, for various uses, such as food preservation, fermenting cabbage, pickles, sauerkraut, grape juice, etc., or making beer, wine, mead Specifications: Material: plastic, rubber Colors: white, black Includes: 40 * silicone grommets 12 * plastic airlocks Only the above package content, other products are not included. Note: Light shooting and different