This stuff is kink free, I used it on my SUPRA drain lines because they were getting kinked from the weight of the bags. You can order this stuff from
www.wakemakers.com, could not find a pic on there website but I did find a picture on a different site.
Its the series 141. Malibu uses it on there boats, its great stuff. $1.69/ft from wakemakers.
http://www.marinehose.net/waterhose.html Here is the link for what I did when using it for replumbing my SUPRA ballast fill system.
http://www.supraboats.com/bbs/showthread.php?t=4595&highlight=tsunami