Tube for Barrel

[HelloWorld]

Hi,
Im looking for a tube With an id of 4,5mm (.177).
Im from Germany. Do You know of any places to buy from?

[vng21092]

I don't know how Amazon deals with international shipping but I get them here:

http://www.amazon.com/s/ref=sr_nr_n_1?f ... =383597011

On the side where it says "Inner Diameter" click on "See More" and on the third page or so you'll see "0.18".