LEGO Light Gray Flexible Hose 1 x 12 with Dark Stone Gray Ends | Brick Owl - LEGO Marketplace
BrickLink - Part 73590c03a : LEGO Hose, Flexible 8.5L with Tabless Ends (Ends same color as Tube, ends not removable) [Hose] - BrickLink Reference Catalog
1x Lego Flex Hose 8,5L Black Connector Flexible Set 6285 6959 73590c01a | eBay