Hose, Flexible 8.5L with Tabbed Ends (Ends same color as Tube) : Part 73590c02a | BrickLink
LEGO City Tracks 60205 - 20 Pieces Extension Accessory Set, Train Track and Railway Expansion, Compatible with LEGO City Sets, Building Toy for Kids, Great Gift for Train and LEGO City Enthusiasts - Walmart.com
LEGO City Trains 7499 Flexible Tracks - Entertainment Earth