These stainless clamps are the best for securing your beer and gas line to barbs/nipples. Unlike other hose clamps they secure the line in a complete and exact circle. Hence the name "stepless" clamps.
5-7mm will suit our 6mm ID beer line on a 6mm barb.
The clamps can be secured with a special crimping tool however normal wire cutters work just as well.
Best sealed when using the Clamp Tool.