Quickun Pneumatic Tubing 6mm x 4mm PU Polyurethane Tube Air Hose Line for Air Compressor Fitting or Fluid Transfer (Black 32.8ft/10Meters) - Amazon.com
Moc Parts Pneumatic Hose Air Pump Push Rod Putter Switch Piston Air Tank Pump Compatible With Legoeds Pneumatic Building Blocks - Iot Accessories - AliExpress
Moc Technical Parts 1 Meters Technical Pneumatic Tube Internal Dia 2mm External Dia 4mm Compatible With Lego For Kids Boys Toy - Blocks - AliExpress
LEGO 5102 Technic Pneumatic Tube Black and Grey 60 and 100 cm | BrickEconomy
MOC Technical Parts 1 meters Pneumatic Tube Internal DIA 2mm External DIA 4mm Compatible with Lego for Kids Boys Toy 5102 21670 _ - AliExpress Mobile
LEGO Black 4mm Diameter Pneumatic Hose 27.2 cm | Brick Owl - LEGO Marketplace
Quickun Pneumatic Tubing 6mm x 4mm PU Polyurethane Tube Air Hose Line for Air Compressor Fitting or Fluid Transfer (Clear 32.8ft/10Meters) - Amazon.com
Pneumatic KIT4 with cylinders,pump,switch,etc (Hose is compatible with Lego) | eBay