This is 2mm OD Aluminum tube very nice tube BRAND NEW with a wall thickness of 0.45mm, The great thing about this tubing that the next size up(3mm) fits the 2mm inside it  and this is the same for all the tubing by K & S. All the tubing the size below fits inside each other.

This is for a 300mm length posted same day as purchase next day delivery please check my feedback.

k and s number 9801