HomeGas-release Valve Gas-Release Valve Contact us for product Gas-Release Valve In order to maintain the coffee's freshness, a safety valve can be attached to the bag and release CO2 off-gassed from the coffee from the package. name Gas-Release Valve class 1個 case num - expiration - code - jan code - RETURN LIST CATEGORY Drip Bag Coffee Coffee Instant Coffee Premixed Products Gas-release Valve Iced Coffee "Nagomi"... Western Teas "Kamonomizu&... Gift Organic Products Creaming Powder Rakanka Coffee Makers Coffee Paper Filt... Materials of Coff... Second-hand coffe... Others