WSDMAVIS 20Pcs One-way Degassing PE Valve with Filter Exhaust Ventilation Vent for Coffee Bag Kraft Paper Bag Food Bags

In its most common application, the valve is used to release, from a container, gas emitted by a product (such as roasted coffee) while preventing air from entering the container and coming in contact with the product itself. The aroma of coffee can be smelled through the exhaust valve, and at the same time, the coffee beans are prevented from oxidizing and the aroma is quickly emitted, ensuring the quality of the coffee beans. Besides,It can also be used for food bags, pet food bags, etc. Size: app.2x0.6cm/0.79x0.24inch(Diameter x high);Pressure resistance temperature: 163℃-168℃;Opening pressure: 2-3mbar. PE Valve only,other accessories demo in the picture is not included.Note:you need some kind of machine to adhere them., Manufacturer: WSDMAVIS