Co2/Targon Tubing, what diameter does it have to be?

[ukapstt77]

I've found some Targon Tubing but what diameter does it have to be to fit co2 bottle/religator?
http://shop.ebay.co.uk/items/__tygon+tu ... 1e60414925

 

[Nelson]

i think its 4mm internal diameter,6mm outer.

 

[ukapstt77]

Thx Neil