N/R Butane Nut x W20 Nut and Tail.
High pressure black hose to (and marked) BS 3212:1991 Type 2. 6.3 mm i.d., 15.5 mm o.d., 20 bar working pressure, 69 bar burst pressure. A self adhesive advisory label is attached to every hose. Red labels for those fitted with full non-return/excess flow valve fittings and a yellow label for other assemblies. S/T indicates straight through and N/R indicates a non-return/excess flow valve. For Butane only.