[ccomer1955]

I saw these, too, but they were in the Netherlands. This company has more sizes to offer. The USA one has a handful, but 11mm is the biggest. The company in Holland goes up to 1".

http://www.techflex.nl/speciaal-cotton-s...anguage=EN

The Rit Dye web page shows how to mix colors to get other colors, like Khaki Green. A guy on ARF uses his Boy Scout skills to tie whip knots at the ends of the tubing to prevent fraying.