Product review (5 stars): This is 1/4 inch outer diameter tubing, 20 foot length
I have not purchased this product, and this is not a review of the product itself, but since the description of the product was missing the actual dimensions of the tubing, I figured I'd update it here, after having looked it up.

So, to recap, this is 1/4 inch outer diameter tubing, 20 feet in length.

Giving 5 stars only because it would be unfair of me to say something bad about the product, not having purchased it here or elsewhere.