Craftsman rubber hose. Good for cfc builds, on sale for $20
http://deals.woot.com/deals/details/f9fa0d1a-7778-4f77-9516-c64ac329a4e4/50ft-garden-hose-save-15#4
http://deals.woot.com/deals/details/f9fa0d1a-7778-4f77-9516-c64ac329a4e4/50ft-garden-hose-save-15#4