The KegLand KL06941 Duotight Push - In Reducer is a must - have for homebrewers and professionals in the beverage industry. You can use it when setting up your kegging system to connect different sized tubes for gas or beverage transfer. It measures 6.5 mm (1/4 in.) on one end and 9.5 mm (3/8 in.) on the other. Whether you're a beginner homebrewer looking for an easy - to - use fitting or an experienced pro seeking a reliable solution, this reducer is perfect for you.