Reduction adapter from a gas cylinder 21.8mm L - 3/8" LManufacturer code: 1013119 High quality reduction for a propane butane LPG gas cylinder with a 21. 8 mm L thread to a 3 8" L diameter connector like in a small, tourist gas cylinder. The 3 8"L gas adapter is required to connect gas hoses supplying gas burners, catering cookers, gas ovens, etc. Product Features: high, precise quality of workmanship metal resistant to external factors withstands very high pressure designed to power gas burners use in