This handy part is what you need to connect one side into a standard 9.5 mm Duotight fitting and secure the other side with 1/4" ID tubing using a hose clamp over the tube. We have wide range of stainless stepless hose clamps that you can purchase .

The barb is slightly oversized at 7 mm (0.27") which should provide a tight seal with 1/4" tubing.

KegLand Part Number: KL25911