Day 016/20. Somewhere in China.

These very useful little red machined aluminium rings came in a pack of 4, , including the mounting screws, shipped direct to me from Shenzhen, Guangdong, China. Each one weighs less than 1 gram.
The total cost including shipping was just £6.99. Amazon would have taken a big chunk of that. Shipping costs another big chunk.
I wonder how much the factory making them made?