I wanted to buy this type of flexible metal hose connected to the spray gun of my kitchen sink tap. As I do not know its specific name, specifically the type of connection used at the two ends, my Google search ends up with irrelevant result. The hardware stores in my country don't seem to have it. The outer diameter of the thin end connecting to the tap is 13mm, the fat end connecting to the spray gun is typical type used in shower hose.
The tap in question looks like this.
The tap I bought from China, taobao. I'm from Singapore.