Technical Tube W/double Dia4.85 40pcs Compatible With Lego Technical Building Blocks Bulk Parts Kids Toys - Model Building Kits - AliExpress
Lego Technic Bricks 6x Medium Stone Grey Elbow 90deg Tube 25214 6151349 NEW | eBay
Lego compatible pneumatic tube
The new macaroni tube | Brickset: LEGO set guide and database
BrickLink - Part 73590c03a : LEGO Hose, Flexible 8.5L with Tabless Ends (Ends same color as Tube, ends not removable) [Hose] - BrickLink Reference Catalog