Don't know the length. I have a single line system and usually just buy 100' and put the left over in the spare rope box. Thanks to Kris H. we are currently using this. It does not kink up and is good on the hands. We're using 4mm.

http://www.apsltd.com/c-1620-Marlin-Paraloc.aspx

Still hazey after all these beers.
F-16 Falcon #212