1 foot length of 16mm copper pipe.
16mm is the outside diameter of the pipe.
This is a very unusual size and very rare in the UK.
SOLD IN 1FT LENGTHS ONLY.
For example, if you buy a quantity of 2 you will get 2 separate 1 foot long pieces of pipe. A quantity of 3 is 3 pieces of pipe, etc ...
Made to the European standard EN1057.