What size is the barrel adapter for the GL-AX1800 (flint)

[dfranklin]

Hi,

What is the inside/outside size of the barrel adapter for the GL-AX1800 (flint), and what is the polarity (tip positive or tip negative).

I love my router but I lost the adapter while moving and I want to avoid paying the expense of shipping a new plug to the UK by buying it locally.

[lizh]

Its specifications are as follows:

SIZE：

Inside:positive
outside:negative